<human>:  When did the first humans land on the Moon?
<bot>: The first humans to land on the Moon were the Apollo 11 astronauts. They landed on the Moon on July 20th 1969, and walked on the surface on July 21st. The Apollo program ended in 1972, but the Lunar Reconnaissance Orbiter, or LRO, was launched in 2009 to study the Moon.