Kryptonians are a fictional extraterrestrial race from the planet Krypton in the DC Comics universe. They are known for their advanced technology and culture, as well as their unique physiology, which grants them superhuman abilities when exposed to the yellow sun of Earth. The most famous Kryptonian is Superman, who possesses powers such as flight, super strength, and heat vision. Kryptonians are vulnerable to kryptonite, a mineral from their home planet, which can weaken or harm them. Their story often explores themes of identity, belonging, and the struggle between their heritage and their adopted home.