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quinta-feira, 29 de agosto de 2013

Lagarto pré-histórico encontrado preso em âmbar

lagarto ambar thumb Lagarto pré histórico encontrado preso em âmbar
O fóssil completo de um lagarto de 23 milhões de anos foi descoberto preservado em um pedaço de âmbar.
Embora não seja o primeiro de tal descoberta, este em particular, é raro porque o lagarto foi encontrado tão bem preservado e ainda tem seus tecidos moles e pele.
Um outro espécime desta espécie já foi encontrado em âmbar mas estava incompleto e pouco pôde ajudar os cientistas.
Especialistas mexicanos agora estão definindo um estudo especial para esta nova descoberta, em um esforço para aprender o máximo possível sobre o assunto.
Criaturas são preservadas em âmbar ao ficarem presos na seiva da árvore que depois se solidifica, aprisionando-os por milhões de anos.
A maioria das criaturas encontradas são insetos, mas o espécime mais antigo já encontrado está um ácaro que viveu há 230 milhões de anos.


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