Pluto's outermost moon, Hydra, was named for a legendary Greek water monster, and it's living up to its name: New data show that the little moon is almost entirely covered in "nearly pristine" water ...

Follow the coils of Hydra this spring to see some of the most strikingly colorful stars in the sky. Out of the 88 constellations, more than half represent animals or hybrids of animals. Some of these ...

Beneath the lake of Lerna in Ancient Greece, was an entrance to the underworld. Within this lake lived a 9 headed, gigantic serpent like monster that both guarded the entrance to the realm of Hades ...

The tiny freshwater hydra is essentially an immortal creature. It can regenerate an entirely new animal from any fragment of its body with just a few thousands of cells. It also does this without ...