Megalodon shark mamas had human-size babies (because they ate their siblings)

Megalodon was the biggest predatory shark that ever lived, and its young were also gargantuan; at birth, they were as big as the average basketball player. 

How did bouncing baby megalodons fuel their impressive embryonic growth? They may have gobbled up their smaller siblings while still in the mother’s womb, a survival strategy shared by some modern sharks.

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