A deep-sea discovery turns frightening as a submarine crew finds aggressive sixgill sharks feasting on a whale carcass and ...

Horrifying footage has captured the moment a tourist submarine in Egypt sank into the Red Sea while its hatches were still open, with passengers still attempting to board.

Shark House contains even clearer evidence. The special includes first-of-its-kind drone footage of three killer whales attacking a great white shark near the shores of South Africa. Watch This ...