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US-SCIENCE-PLACENTAL MAMMAL
TO GO WITH AFP STORY BY JEAN-LOUIS SANTINI
This artist’s rendering shows the hypothetical placental ancestor, a small insect-eating animal. The research team reconstructed the anatomy of the animal by mapping traits onto the evolutionary tree most strongly supported by the combined phenomic and genomic data and comparing the features in placental mammals with those seen in their closest relatives. An international team of researchers has reconstructed the common ancestor of placental mammals—an extremely diverse group including animals ranging from rodents to whales to humans—using the world's largest dataset of both genetic and physical traits. In research to be published in the journal Science, the scientists reveal that, contradictory to a commonly held theory, placental mammals did not diversify into their present-day lineages until after the extinction event that eliminated non-avian dinosaurs, and about 70 percent of all species on Earth, some 65 million years ago. = RESTRICTED TO EDITORIAL USE - MANDATORY CREDIT " AFP PHOTO / CARL BUELL/AMERICAN MUSEUM OF NATURAL HISTORY/" - NO MARKETING NO ADVERTISING CAMPAIGNS - DISTRIBUTED AS A SERVICE TO CLIENTS =
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Detalii fotografie |
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New York, UNITED STATES |
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AFP / Mediafax Foto |
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| Fotograf: |
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CARL BUELL |
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| Data: |
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7 Februarie 2013 |
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| Dimensiuni: |
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1500 x 2045 (656.24 KB) |
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