[Alas Babylon!]

Good find! I've heard that during this time there were no ice caps on the poles except in winter. Mammals could have migrated across the North America-Greenland--Europe land bridge as well as the Asia-North America land bridge. Palms grew as far North as 55 Degrees.

[blam]

120 million years ago Africa and South America were connected. I wonder what things looked like 55 million years ago. I'll be a lot more things were 'connected' then.

[rustbucket]

I've heard that during this time there were no ice caps on the poles except in winter. Mammals could have migrated across the North America-Greenland--Europe land bridge as well as the Asia-North America land bridge.

Assuming the amount of water on earth was relatively constant, wouldn't the absence of ice caps mean more water for the oceans and thus fewer land bridges?