Megalodon is a shark that was instinct about 3.5 million years ago! Isn’t that amazing. The biggest Megalodon was actually 58ft long! Megalodon life could go up to 88 to 100 years old that how long human can live too! Well if Megalodon still exist than that would be bad because Megalodon is dangerous because sharks could actually be a predator to human which they would kill human probably even sea life creatures.