alternatehistory.com

Was at dinosaur museum with son and got to thinking. Dinosaurs like T-Rex and Allyosaurus and Velociraptor were all two legged. Fast, binocular vision, viscious.

How come mammels haven't developed a similar phenotype? Why are all mammelian predators four legged pouncers?

I'm not including apes, chimps, or humans, as these are not true carnivors, they're omnivores.
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