The Kármán line is an internationally recognized boundary that defines the edge of space, located at an altitude of 100 kilometers (62 miles) above sea level. Named after the Hungarian-American engineer and physicist Theodore von Kármán, this line marks the point where the atmosphere becomes too thin for conventional aircraft to generate sufficient lift. Above the Kármán line, the Earth's atmosphere transitions into outer space, where aerodynamic lift is no longer effective. This boundary is significant for space exploration and aviation, as it helps differentiate between atmospheric flight and space travel, influencing regulations and definitions in the aerospace industry.