Articles on Ice Age

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The now-extinct giant beaver once lived from Florida to Alaska. It weighed as much as 100 kilograms, roughly the same as a small black bear. Illustrated by Luke Dickey/Western University

Why giant human-sized beavers died out 10,000 years ago

Scientists studied the fossilized bones of giant beavers to understand what they ate and whether the species could keep up with environmental change.
Droplets rising from the Champagne vent on the ocean floor in the Mariana Islands. Fluids venting from the site contain dissolved carbon dioxide. NOAA Ocean Explorer

Deep sea carbon reservoirs once superheated the Earth – could it happen again?

Thousands of years ago, carbon gases trapped on the seafloor escaped, causing drastic warming that helped end the last ice age. A scientist says climate change could cause this process to repeat.
Hypothetical reconstruction of the largest extinct megapode, Progura gallinacea (right), with a modern Brush-turkey and a Grey Kangaroo. Artwork by E. Shute, from photos by Tony Rudd, Kim Benson and Aaron Camens

Tall turkeys and nuggety chickens: large ‘megapode’ birds once lived across Australia

Large birds once lived across Australia, only to become extinct around the time that giant marsupials and other megafauna died out during the Pleistocene "ice ages".
Glaciers have been a major contributor to sea-level rise. Knut Christianson

What does the science really say about sea-level rise?

Could sea levels really rise by several metres this century. Probably not, although this century's greenhouse emissions could potentially set the stage for large rises in centuries to come.

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