Although an extinct animal was from a different group of marine mammals, an examination of fossils showed it evolved a way of eating that was very similar to that of modern walruses. By Asher Elbein ...

You can help climate researcher keep track of these marine mammals as their habitats are threatened by climate change. Credit: Paul Souders via getty images We love a good photo hunt, and we love it ...

Follow a paleontologist on an Arctic adventure to uncover the hidden lives of walrus and the threats they face as climate change shrinks the sea ice. Nature is available to stream on pbs.org and the ...