Cold and ice, not heat, episodically gripped tropical regions 300 million years ago

Geoscientists have long presumed that, like today, the tropics remained warm throughout Earth's last major glaciation 300 million years ago.

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<p><a href="http://www.physorg.com/news136738314.html">Cold and ice, not heat, episodically gripped tropical regions 300 million years ago</a></p> <p>Geoscientists have long presumed that, like today, the tropics remained warm throughout Earth's last major glaciation 300 million years ago.</p>