An analysis of the sloth family tree suggests three different groups of the animals evolved to gigantic sizes in response to ...

A group of fossils of elasmosaurs—some of the most famous in North America—have just been formally identified as belonging to ...

DNA is the genetic code that provides the biological instructions for every living species, but not every bit of DNA helps ...

There’s a good chance you’ve never heard of it, let alone seen it, but this may be one of the most ubiquitous animals on the ...