Look at the map of the Eocene world above.  Isn’t it beautiful?  Europe separated from Asia by a sea boundary.  Australia blissfully isolated.  Antarctica is looking lush.  South Americans will make their own jokes about the gulf in the north west of their continent; I’m unfamiliar with their rivalries.  The Muslim world is almost entirely submerged.  No sea appears between Mexico and the US, however.  You can’t have everything.

Anyway, world leaders have pledged to prevent average global temperatures rising by more than 2 degrees Celsius.  What would happen if temperatures went higher than this?

The last time we had a really hot spell was during Read More