Valhallan

The Valhallans are a race of immortal warriors who have visited Earth thousands of years ago and became the inspiration for the Norse deities.

Among the most famous of them is Thor, who possesses a magic hammer and magic gloves, and is described as the only one who can defeat the Frost Giants which often wage war against the Valhallans.

Biology
This species seems to be immortal, and Thor claims that he has never been a child. Similarly, the other Valhallans are only vaguely familiar with the concept of childhood. The consumption of alcohol seems to have a similar effect on them as it does on earthlings.

Appearances

 * Lost in Space, s02e20 - "The Space Vikings" (1967)