Questões de Concurso

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

O texto seguinte servirá de base para responder às questões de 1 a 9.

Valdivia Figurines and the appeal of 'the oldest'

(1º§) The logo for the Ecuadorian Ministry of Culture website is about my favourite thing of the afternoon which is saying a lot since I spent much of the day reading about giant Olmec heads. Three Valdivia Figurines in the colours of the Ecuadorian flag? I am sold! Golly, I love Valdivia figurines for all the right and all the wrong reasons.

(2º§) There are two things that can easily be said about Valdivia figurines: they are VERY Ecuadorian and they are VERY looted. The first explains why they appear prominently on the Ministry of Culture website (and on stencilled graffiti around Quito circa 2007). Ancient Ecuador has played second fiddle to Ancient Peru since the early days of archaeology. The Valdivia culture, however, represents something that Peru doesn't have, 'the oldest'. Everyone loves 'the oldest', national pride, etc. etc.

(3º§) Who else loves 'the oldest'? Collectors and Museums. If the Valdivia pottery sequence is the oldest in the new world, collectors want a slice of that pie. Heck, even better than some junky pottery, the Valdivia made interesting figurines: lovely ladies that look good on stark black backgrounds in auction catalogues. They are part of 'the oldest' yet they also look good.

(4º§) Valdivia sites are famously looted and Valdivia figurines are famously faked. A few years back I started doing some initial work into looting in Ecuador (which led to fieldwork in Quito and the cloud forest that didn't really go anywhere as of yet) and I, like anyone else going down that road, came across Bruhns and Hammond's 1983 Journal of Field Archaeology piece 'A Visit to Valdivia'. Knowing nothing at all about Ecuador at the time, I had never heard of Valdivia, a wonder since the only Ecuadorian archaeology books that Cambridge owns are a few by the late Betty Meggars and Emilio Estrada from the 1950s and 1960s which link uber-ancient Ecuador to Jomon Period Japan (yeah...I know). As Bruhns and Hammond relate, Meggars detected faking at Valdivia immediately after the start of her excavations: practical jokers who discovered a market for their copies. As the market for the pieces grew, the presumed fakes get more and more elaborate and fanciful...and Valdivia sites were just looted to pieces.

(5º§) So really with Valdivia we are left with a situation where we don't know what is real. It is directly comparable to the Cycladic Figurine problem: the corpus is mostly looted, it contains tons of forms not found in the limited archaeological excavations that have been conducted, and we intellectual consumers of artefacts don't know what to believe. To me Valdivia figurines are the perfect looting Catch 22: they warrant study so that the interested public can learn about 'the oldest', but they can't be studied because collectors wanted 'the oldest' so sites were looted and buckets of fakes were produced.

(6º§) In 2007 I bought a fake Valdivia figurine in Otavalo which now stands in a Spondylus shell on my counter and watches me cook. The fella selling it to me told me it was real. I knew it wasn't but made to put it back saying something along the lines that law breaking makes me sick. He quickly agreed that it wasn't real and cut his asking price by a ton. Que Sera. Three cheers, Ecuadorian Ministry of Culture, your logo is the best.

https://www.anonymousswisscollector.com/2012/09/valdivia-figurines-a

nd-appeal-of-oldest.html

Leia o texto para responder às questões de 1 a 06.

Sonda chinesa identifica mineral inédito na Lua

As crateras lunares são resultado da colisão entre a Lua e objetos celestiais, como asteroides e cometas. O impacto é rápido, envolvendo alta velocidade, pressão e temperatura. O fenômeno, além de alterar o relevo da superfície do satélite natural da Terra, também é responsável por mudanças na composição mineral do solo lunar, chamado de regolito. Por isso, uma das formas de estudar o passado da Lua consiste em analisar os minerais que compõem a sua superfície. Recentemente, a missão chinesa Chang'e-5 retornou para a Terra com 1,73 kg de regolito, fornecendo novos materiais para a investigação da história do nosso satélite natural.

Os pesquisadores identificaram um novo mineral lunar, o Changesite-(Y), bem como minerais do grupo dos silicatos em uma combinação considerada “desconcertante”. As amostras foram coletadas em uma região denominada Oceanus Procellarum. Tais descobertas foram descritas em artigo publicado na revista Matter and Radiation at Extremes na última terça-feira (6).

De acordo com as estimativas dos cientistas, a colisão de objetos celestiais que resultou nas amostras teve uma pressão máxima entre 11 e 40 GPa e uma duração de 0,1 a 1 segundo. A cratera gerada na Lua pode ter entre 3 e 32 km de largura.

O novo mineral Changesite-(Y) pertence ao grupo dos fosfatos e é caracterizado por colunas de cristais transparentes, sem cor. A combinação dos silicatos, por sua vez, inclui a seifertita e a estishovita — ambas quimicamente similares ao quartzo, mas com estruturas cristalinas distintas.

O fragmento que contém seifertita e estishovita surpreendeu os pesquisadores, uma vez que esses minerais, teoricamente, só coexistiriam em pressões muito mais elevadas do que as da amostra. “Embora a superfície da Lua esteja coberta por dezenas de milhares de crateras de impacto, minerais de alta pressão são incomuns em amostras lunares”, afirma a pesquisadora e autora do estudo Wei Du em nota. “Uma das possíveis explicações para isso é que a maioria dos minerais de alta pressão são instáveis em altas temperaturas.”

No caso da amostra coletada pela missão Chang'e-5, levantou-se a hipótese de que a presença de um terceiro polimorfo dos silicatos, a o-cristobalita, pode ter sido importante para viabilizar a combinação de seifertita e estishovita.

“A seifertita pode ter se formado a partir da acristobalita durante o processo de compressão, e uma parte da amostra se transformou em estishovita durante o subsequente processo de elevação de temperatura”, propõe Du.

Revista Galileu. Disponível em<https:/'revistagalileu.globo .com/ciencia/espaco/noticia/2024/02/sonda-chinesa-identifica-mineral-inedito-na-lua .ghtm]>

Leia o texto para responder às questões de 1 a 05.

Possível caso de altruísmo é observado entre elefantes-marinhos

Em registro raro feito nos Estados Unidos, pesquisadores acompanharam um macho da espécie Mirounga angustirostris salvando um filhote com poucas semanas de vida

Em artigo publicado em janeiro na revista Marine Mammal Science, pesquisadores relatam um possível episódio de altruísmo entre elefantes-marinhos da espécie Mirounga angustirostris. O caso ocorreu na Califórnia, em 27 de janeiro de 2022, e é considerado raro, especialmente por envolver um mamífero marinho macho.

Os autores do estudo caracterizam o altruísmo como um comportamento de assistência voltado para um indivíduo necessitado. O altruísta seria responsável por uma ação que reduz sua própria chance de sobrevivência e reprodução, mas que beneficia a sobrevivência do outro.

O episódio observado pelos cientistas durou cerca de 20 minutos e envolveu um filhote com menos de duas semanas de vida, uma fêmea que cuidava dele e um macho que fazia parte do grupo de elefantes-marinhos da região. O filhote e a fêmea estavam juntos, mas foram separados pela maré e pelas ondas. Distante cerca de 15 metros, a fêmea atingiu águas mais rasas e começou a vocalizar, chamando o filhote. Ele, por sua vez, não conseguia nadar e era puxado para mais longe pelas ondas. Então, um macho, identificado como o alfa do grupo, se aproximou da fêmea e, logo depois, seguiu em direção ao filhote — que já estava a aproximadamente 40 metros da fêmea. Ao alcançar o filhote, o empurrou gentilmente com a cabeça para retornar à costa. O mais velho ajudou o mais novo até que eles estivessem a quatro metros da fêmea e finalmente o filhote estivesse junto da mãe.

O caso chama atenção porque elefantes-marinhos machos geralmente não participam do cuidado com os filhotes. “O comportamento de perseguir o filhote e empurrá-lo em direção à costa poderia ser interpretado como comportamento sexual mal direcionado, em que machos dominantes frequentemente conduzem e escoltam fêmeas para a costa para evitar assédio por outros machos. No entanto, propomos que as ações foram intencionais”, escrevem os pesquisadores no artigo.

Eles ressaltam que a condução do filhote foi feita de forma gentil e que, depois, o macho não se aproximou da fêmea, apenas emitiu um som na direção dela. Além disso, os cientistas defendem ter sido um episódio de altruísmo, já que o macho gastou uma energia que poderia ter sido usada para acasalar, defender sua posição contra outros machos ou se manter vivo durante o período de jejum típico dessa espécie.

Revista Galileu. Disponível em

<https://revistagalileu.globo.com/ciencia/biologia/noticia/2024/02/possivel-caso-de-altruismo-e-observado-entreelefantes-marinhos.ghtml>