The protein myoglobin provides new clues to the evolution of diving in mammals.
It's a big deal when an oil tanker spills its contents into the ocean. And for good reason. But what about oil spills that aren't caused by humans?
You've probably heard that global warming in the Arctic is killing off polar bears by shrinking their habitat, but are other arctic animals suffering, too?
Are whales ruining our environment? Find out on this Moment of Science.
A few things happen as you swallow. The back section of the roof of your mouth, also called the soft pallet, closes off the nasal passages so that food doesn’t go up into the nose.
Eating snow to obtain water is metabolically expensive–it would take too much energy to melt down enough snow. Consequently, polar bears have evolved so that they don’t need to drink free water.
Killer whales communicate in a variety of dialects. There are discernible differences, however, between the chatter of killer whales that eat only fish and those that eat both fish and seals.