Animals have evolved to eat a lot of different things, even stuff that barely passes for food, and it shapes our entire lives from what we look like to where we live. Today, we’ll talk about why being ...

Prefer Newsweek on Google to see more of our trusted coverage when you search. Scientists have long been mystified about how animals who munch on plants in Yellowstone National Park all get enough ...

One of the earliest known fossil animals, Dickinsonia lived on the sea floor over a half billion years ago. Based on traces of a biochemical marker, coprostanol, UC Davis paleobiologists propose that ...