There is evidence of a past warming period in Earth’s history.  A previous spell of global warming, if you will.

Scientists at the Smithsonian Tropical Research Institute participated with other organizations in a research study to find out what effects global warming on our planet’s past vegetation – and by past, I mean the Paleocene Epoch!

Something really interesting caught my attention as I was reading a summary of the findings.  Contrary to the belief that tropical forests were devastated under the conditions of global warming, new plants evolved at a faster rate than ones that became extinct.  Pollen from the cacao plant family (and the passionflower plant family) appeared suddenly, for the first time, during this warming event.
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