The megalodon shark was one of the fiercest and largest predators to ever swim in the ocean. Capable of reaching lengths twice the size of Tyrannosaurus Rex and carrying a bite force that could crush an automobile, the meg, or Carcharocles megalodon, was the ruler of the prehistoric seas.

And yet, despite being at the top of the food chain with no known predators, the shark went extinct around 2.6 million years ago.

It’s a mystery we’ve yet to solve. There are countless theories, but nobody has been able to explain for sure why, right before the dawn of humanity, one of the ocean’s deadliest predators disappeared.