It's from this collection of science-related cartoons.
A couple of other samples from the same source:
As usual, all hail ImageShack, the greatest image hosting service *ever* -- free, fast, reliable.
And one for the physics nerds:
Hee hee.
You've made a particularily stressful day a lot easier to recover from. Thanks.
I love these, especially the dog one. Does anyone remember Gary Larson and Far Side - he had a couple of toons about "Great Moments in Evolution"?
The one I remember is a couple of fish at the surface, one has a baseball bat and one with a cap and glove. Unfortunately their ball is about 10 fish paces onto dry land. The title; Great Moments in Evolution.
i suppose there would be copyright problems with postings from the Far Side. Hell I can think of a bunch of Calvin and Hobbes I'd like to see too.
Love them. Thank you!!
I really like S. Harris also. :-)
http://www.sciencecartoonsplus.com/scimags.html