As winter sets in, many warm-blooded animals tuck themselves in to escape the cold and hibernate until conditions thaw.

The shrinking sea ice in the Arctic Ocean is, overall, a disaster. But paradoxically, the melting of the ice can also fuel the engine of the Arctic food chains: algae. Hippos, today restricted to ...

What's lurking in your freezer: a lasagna or deep-frozen pizza? Conservationists rely on freezers too—but they run much cooler than your model, with the thermostat set to a frosty -196°C, the ...