Kryptonians

Kryptonians are a fictional humanoid species from the planet Krypton in the DC Comics universe. They are commonly depicted as scientifically advanced and physically capable beings who built a highly developed civilization before Krypton’s destruction.

Physiology and powers: Kryptonians share humanlike anatomy but display extraordinary abilities when exposed to a yellow sun, such as on Earth. These powers often include super strength, speed, flight, invulnerability, and energy-based abilities like heat vision and X-ray vision. Their powers are diminished under red solar radiation, and exposure to kryptonite—radioactive fragments from Krypton—can weaken or harm them.

Society and history: Krypton is portrayed as a highly technological and scientific civilization with strong institutions and a meritocratic or technocratic governance in many versions. In numerous continuities, Krypton experiences a cataclysm that destroys the planet or renders it uninhabitable, leading to off-world refugees such as Kal-El and other survivors who settle on Earth or other worlds.

Culture and technology: Kryptonian culture emphasizes science, exploration, and preservation of knowledge. Their technology includes advanced space travel, genetics and life-extension sciences, and sophisticated urban and architectural achievements, often depicted as integrated with environmental and ethical considerations.

Notable Kryptonians: Kal-El (Superman), Kara Zor-El (Supergirl), Jor-El, Lara, General Zod, among others.

In media: Kryptonians appear across comics, radio, animated series, and live-action adaptations, including films like Man of Steel and various television series. Details and interpretations vary between different writers and media franchises.