5 Terrifyingly Gigantic Animals That Are Thankfully Extinct

From 8-foot scorpions to sharks the size of semi trucks, humanity would've had a hard time rising to the top of the food chain if these prehistoric creatures still existed. Fortunately, they only exist on our nightmares.

Cast and Crew

Head of Production:  Moana Sherrill
Editor:  Justin Donaldson
Adaptation, Voice Over:  Daniel O'Brien
Post Producer:  Nick Rood
Post Production Supervisor:  Christina Newhall
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