World's simplest animals get their place in the tree of life

The group with the world's simplest animals—tiny blob-like life forms with no organs and just a few cell types—finally has a fleshed-out family tree built by a research group led by the American Museum of Natural History, ...

Study refutes claim that T. rex was three separate species

A new study refutes a provocative claim made earlier this year that fossils classified as the dinosaur Tyrannosaurus rex represent three separate species. The rebuttal, published today in the journal Evolutionary Biology ...

Dynamic rivers contributed to Amazon's rich bird diversity

One of the most contentious questions in evolutionary biology is, how did the Amazon become so rich in species? A new study focused on birds examines how the movements of rivers in the Amazon have contributed to that area's ...

Extinct ground sloth likely ate meat with its veggies

A new study led by researchers at the American Museum of Natural History suggests that Mylodon—a ground sloth that lived in South America until about 10,000 to 12,000 years ago—was not a strict vegetarian like all of ...

Extinct 'horned' crocodile gets new spot in the tree of life

A study led by scientists at the American Museum of Natural History has resolved a long-standing controversy about an extinct "horned" crocodile that likely lived among humans in Madagascar. Based on ancient DNA, the research ...

page 2 from 20