The more we learn about the giant ancient shark Megalodon, the more of its rather scary nature we uncover it seems. The biggest species of shark ever to have existed in Earth's history had a rather unconventional way of getting a headstart in life and growing up to be so massive, a new research has revealed.

The study conducted by paleobiologists at Chicago’s DePaul University states it is likely that embryonic megatooth sharks ate the unhatched eggs in their mother’s womb. Moreover, the team found that the babies gave birth to babies 6.5 feet (two meters) long which is larger than an average adult human.

Scientists think that Megalodon consuming their own unborn siblings first might be the reason why they grew to be so massive.