Woolly mammoths have become the poster child for de-extinction. The giant land mammals have long held our intrigue and fascination.

A bear’s diet generally varies by season. In the greater Yellowstone ecosystem, they eat big game, elk calves and cutthroat trout in the early summer; anything from moths to berries to grass in ...

Woolly mammoths are at the forefront of controversial de-extinction efforts, writes Rebecca Woods in a commentary.