Christian shreds on the bowmouth guitarfish & Ellen shakes things up with the timber rattlesnake. We discuss the shark-ray spectrum (which is not a laser beam that turns you into a shark),  weird teeth, how a snake's rattle works, and why you should peacefully leave them alone.

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Cover photos: Tomas Kotouc via Getty images (bowmouth guitarfish) & tamers1 via Getty images (timber rattlesnake)