Spider-Man, a popular superhero in the Marvel Comics universe, gained his superpowers after being bitten by a radioactive spider. The story of Spider-Man's origin varies somewhat depending on the version, but the basic premise is that Peter Parker, a high school student and science enthusiast, is bitten by a spider that has been irradiated in a science experiment. The spider's bite gives Parker spider-like abilities, including superhuman strength, agility, and the ability to cling to walls and ceilings. Parker initially uses his powers for personal gain, but after his uncle is killed by a criminal he could have stopped, he learns a valuable lesson about responsibility and decides to use his powers to fight crime and protect the innocent as Spider-Man.