Kryptonian

Kryptonians are an endangered humanoid species resembling humans but have a variety of superhuman abilities under a yellow sun as a by-product of evolution on Krypton. Their native homeworld is the planet Krypton.

Superman is the considered the last surviving Kryptonian of the planet Krypton.

Batman believes Kryptonians have "very hard heads".

Biology
Kryptonians superficially resemble humans, however, due to their alien physiology they possess super-powers. Kryptonians are generally powerless under red sun radiation but under yellow sun radiation they possess vast superhuman abilities ranging from superhuman strength to flight. They are notably vulnerable to the radiation produced by Kryptonite.

Known Superhuman Abilities

 * Superhuman Strength - Kryptonians possesse vast superhuman strength enabling them to lift objects of great mass.
 * Leap - Kryptonians can leap great distances.
 * Superhuman Speed - Kryptonians can run at incredible velocities but the Flashes are faster.
 * Invulnerability - Kryptonians are completely impervious to extreme heat and cold. They're also able to withstand almost any forms of injury.
 * X-Ray Vision - Kryptonians are able to see into the X-Ray portion of the spectrum.
 * Heat Vision - Kryptonians can emit intense heat beams from their eyes.
 * Superhuman Hearing - Kryptonians can hear vast distances.
 * Flight - Kryptonians can defy gravity and fly.

Notable Kryptonians

 * Superman
 * Superboy