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Friday Creature Feature

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Meet Dimetrodon, a meat-eating reptile from the Permian period. A typical Dimetrodon was around 11 feet long and had a big sail on its on back it may have used for temperature regulation and/or display.

I find these guys interesting because I’d always thought evolution followed this simple line that went reptile—->mammal. I didn’t know what came before. (Amphibians, DUH. But that’s another entry.) So I had no idea these “mammal-like reptiles” were around long before the reptilian dinosaurs.

Dimetrodon-dinosaurs-22052354-700-466

I love these pre-pre-historic monsters. 

It should be noted that Dimetrodon are often included in Dino-related toys and apps. Dimetrodon was not a dinosaur and made its mark long before dinosaurs were just a gleam in Mother Nature’s eye. If anybody tries to tell you Dimetrodon is a dinosaur, please respond by beating him or her soundly about the head and shoulders. Or you could just do what my 2-year-old son does and say “You say it WONG. Dimeetrodong is a weptile. Not a dinocore.” (He cannot say “s’s.”)

Also not a Dimetrodon

Greg notes, in the comments:

Also, more time passed between the stegosaurus and the T. rex than between the T. rex and the present.

OK, now tell me that doesn’t blow your mind.

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