The world watched on television as Neil Armstrong from Apollo 11 was the 1st human to leave footsteps on the moon on July 20, 1969. It was the 1st time humans walked on another world as he stepped onto the lunar surface, Armstrong said: “That is one small step for [a] man, one giant leap for mankind.” Still image via NASA video.Read all about the 1st footsteps on the moon – 56 years ago – and celebrate International Moon Day.