A new study finds that the extinct European cave bear’s large sinuses represent a tradeoff between hibernation length and the flexibility of their diets.

Opponents of the proposal call the changes a “wildlife extinction package.”

Modern brown bears carry DNA from extinct cave bears that lived during the Ice Age.

Gut microbes may help regulate the metabolic changes a bear experiences before and during hibernation, scientists show.

Latest analysis suggests the yeti is a known bear species, not the new, hybrid species suggested by a previous study.

A genetic switch in hibernating bears keeps the animals from becoming insulin-resistant. 

Genomic analyses reveal that the polar bear evolved between 4 and 5 million years ago, far earlier than previous studies had estimated.