There are tons of terrifying creatures lurking in the dark, cold, pressurized environment of the deep sea, from a ginormous relative of the garden pill bug, to fish with translucent heads.

We've mapped the surface of Mars in more detail than the bottom of our own oceans. Over 80% of the seafloor remains unexplored, and the creatures that live down there make science fiction look ...

The vast majority of our planet remains a complete mystery, hidden beneath miles of crushing water where sunlight never penetrates. In this eternal darkness, evolution has taken a path so bizarre that ...