Ancient Mantle Waves Inside Earth May Have Lifted Antarctica's Mountains Before It Froze Over
Antarctica froze over 34 million years ago, when the planet was around 9 degrees Fahrenheit (5 degrees Celsius) warmer than today, while the Northern Hemisphere did not form large ice sheets for more than 20 million years after that. Falling carbon dioxide levels were known to play a role, but…
bubmagJuly 6, 2026