Kryptonians

Kryptonians are the endangered, near-Human race of the now destroyed planet Krypton. The Kryptonians veiwed themselves as the natural enemy of the Dheronians due to their waging of war every twenty years for each other's treasures. This conflict later led to the destruction of both Krypton and the Kryptonians, save one, Kal-El. Superman: Earth One

History
The Kryptonians evolved at similar rates to the Dheronians of Dheron. Unlike Dheron, their planetary climate was suitable and their natural resources were rich. They developed limited-range space flight at roughly the same time as Dheron. Every twenty years, when Dheron and Krypton's respective orbits were close enough for interplanetary travel, the two races were at war for each other's treasures. In an act of revenge and leverage, the Dheronians ensured that the Kryptonians never advanced far enough in their own efforts at star travel to gain any advantage over them. The Kryptonians later did the same to them. Two years after being visited by a mysterios race, the Dheronians launched a series of probes into deserted parts of Krypton's surface. They used the mysterios technology to avoid detection. The probes caused Krypton's core to become unstable. Some of Krypton's scientists noticed fluctuations in their planet's core and tried to warn the rest, but to no avail. One of these scientists, Jor-El, built a ship to carry his newborn son, Kal-El, to the planet Earth knowing that he would be strong and nearly indestructible under their yellow sun. Kal-El's ship left the planet just as it exploded. Superman: Earth One

Powers
Once outside his star system, the Kryptonian, Kal-El acquired new abilities determined by the frequency of Earth's yellow sun's light and internal radiation. Superman: Earth One