Evidence that ancient reptiles were extremely happy

Today I was skimming through some scientific papers on my ‘to read’ list. At the end of a Scientific American paper by Jonathan B. Losos, entitled Adaptive Radiation, Ecological Opportunity, and Evolutionary Determinism, an old drawing filled in the empty space below the reference list. Here is the drawing with the caption:

Ancient Reptiles

Judging from the blissful smile on the faces of these ancient reptiles, they were extremely happy to be alive. Very convincing (although indirect) evidence that life in these times was more relaxed than nowadays! Which reminds me, I should continue finishing my ‘to read’ list…

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