In "Ends of the Earth," Neil Shubin travels north and south to explore the frontiers of polar science and history.

Then the polar bear appears. She’s big ... “They think of it as an ice cap. They think that it’s rigid and that when it melts it’s just melting back on the edges. They don’t think ...

Polar bears are the planet’s biggest land-based carnivores – although they actually spend most of their lives around water and ice (their Latin name means ‘sea bear’). So they’re at particular risk ...

At the edge of the Arctic in northern Canada, the annual migration of polar bears draws tourists, photographers, and ...

Scientists discovered that polar bear fur’s oily coating prevents ice from sticking, thanks to a unique mix of lipids. This ...