Curious when the ocean freezes? Learn how salt affects freezing and why sea ice forms in only the coldest climates.

Antarctic icefish have clear blood, no hemoglobin, and antifreeze proteins that let them survive freezing seas.

Most assume that cold water is deadly for fish. The truth is, nature has incredible exceptions. In polar oceans and snowy lakes where temperatures hov.

In the freezing waters of the Southern Ocean, one man faces nature’s ultimate test — a shark attack miles from help. Battling cold, fear, and blood loss, he somehow makes it out alive. This is the ...