You have something in common with polar bears. Polar bears and humans produce sebum. It's an oily substance that comes from ...

Polar bears spend most of their time on the ice ... The Arctic would be un-bear-able without them. Adults can help kids submit a question at askdruniverse.wsu.edu/ask. Local journalism is essential.

You have something in common with polar bears. Polar bears and humans produce sebum. It's an oily substance that comes from our hair glands. In humans, sebum helps protect your skin from ...