http://www.news.cornell.edu/stories/March06/social.bees.evolution.ssl.html

Social behavior of sweat bees evolved with Earth’s warming

Sweat bee (Image: Troy Bartlett)

In the first study to link social evolution to climate change, Cornell University entomologists have shown that the social behavior of many species of sweat bees evolved simultaneously during a period of global warming about 20 million years ago.

(I’ll add a bit more to this review later…)

For more info on bee phylogeny (should you be interested…) see here.

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