A July 13 Instagram post (direct link, archive link) features a graph charting historic atmospheric carbon dioxide levels and temperature variations over the past 400,000 years. “Antarctic ice core ...

First, what is an ice age? It’s when the Earth has cold temperatures for a long time – millions to tens of millions of years – that lead to ice sheets and glaciers covering large areas of its surface.

The claim: The 'six great ice ages' began when CO2 was higher than now; all plants and animals die when CO2 levels are cut in half A July 4 post (direct link, archive link) on X, formerly Twitter, ...

A new study published last week is giving us a better idea. The research builds on previous hypotheses theorizing that Ice Ages occur on a predictable timeline that relates to the geometry of Earth’s ...

For decades, scientists have been curious about how much water Mars once had and what led to its gradual transformation into the dry planet we see today. A new study published online on September 2, ...

The last million years of Earth history have been characterized by frequent “glacial-interglacial cycles,” large swings in climate that are linked to the growing and shrinking of massive, ...

A group of scientists think they can now predict when the next ice age could grip Earth, but don't worry, it's not for a very long time. An ice age should begin in about 10,000 years, but its onset is ...

Glaciers that still exist on the surface of Mars are helping to tell the story of its past. The red planet experienced between six and 20 separate ice ages during the past 300 to 800 million years, a ...