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Chris, Jeff and Dickie search for the world's largest male great white.
Shark professionals re-enact five real-life attacks.
Designers create a 52-foot mechanical mega-shark based on the megalodon.
Researchers Dr. James Sulikowski and Beckah Campbell aim to solve the mystery of where the elusive pregnant scalloped hammerheads give birth using the latest underwater ultrasound and birthing tag technology, and it's closer than you realize.