Beyond mythology and specific lore, the concept of a three-headed hydra can also be used metaphorically, as seen in our health situation. There were 50 cases of mpox in May; a stronger strain of ...

A view of the Greek island Hydra. James Burke / Time Life Pictures / Getty Images. While it seems tiny and low-key, overachieving Hydra holds a privileged place in Greek history.

Hydra, Pluto's outermost known moon, orbits Pluto every 38 days at a distance of approximately 40,200 miles (64,700 km), while Nix orbits every 25 days at a distance of 30,260 miles (48,700 km).