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Dinesh

Dinesh club

Posted: 23 Nov 2023

Taken: 23 Nov 2023

2 favorites     1 comment    23 visits

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Page 138 •
From •
Evolution •
Triumph of an Idea •
Author •
Carl Zimmer •

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this photo by Dinesh

The Evolutionary tree of Whales offer clues to how coyote-like mammals gradually adopted to life in the ocean

www.ideastream.org/news/health-science/2014-08-04/in-search-of-walking-whales

Malik Raoulda, Paolo Tanino have particularly liked this photo

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 Dinesh
Dinesh club
Pakicetus, which lived 50 million yers ago, was far from the first whale. Mesonychids and whales all share a common ancestor, and that common ancestor must have lived before both the older known whale and the oldest known mesonychid. While the oldest known whales are about 50 million years old, there are fossils on mesonychids dating back 64 million years. Thus, whales must have diverged from mesonychids before 64 million years ago, more than 14 million years before Pakicetus lived.

Early whales still had legs attached to their shoulders and hips, which in turn were firmly attached to their spines. Their ears still resembled the ears of land mammals, which can pick up sounds in the air. Their tech still resembled those of mesonychids in their general outline, but they were already changing. . . . Page 138
6 months ago. Edited 6 months ago.

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