Temperatures in Florida could dip as low as 23 degrees in some areas, prompting freeze warnings for thousands.

A female narwhal was found last month on a beach in northern Ireland. While some experts believe it's a sign of a changing marine environment, others say it's not that unusual.

Wintry weather is sweeping across parts of the United States this weekend, bringing with it brutally low temperatures. NBC ...

An Inupiaq elder teaches his great-grandson to hunt in rapidly warming Northwest Alaska where thinning ice, shifting caribou ...

Global competition in the Arctic is raising hopes of a revival in the town of Churchill. We went to meet the people, and the ...

The climate is changing and nowhere is it changing faster than at Earth's poles. Researchers at Penn State have painted a ...

Researchers say the findings, the first documented case of rising temperatures driving genetic change in a mammal, offer a ...

Blood samples from warm vs. cold Greenland bears reveal genetic patterns that could predict how polar bears respond to ...

Cosmic dust trapped, or blocked, by Arctic ice allowed researchers to map 30,000 years of sea-ice history. Their findings ...

Researchers discovered that unusually high temperatures can hinder early childhood development. Children living in hotter ...