THE Russisans launched the world's first artificial satellite,Sputnik I,on October 4,1957.Next,Sputnik 2,carrying a dog called Lanka,went up into space on November 3,The Americans launched Explorer I,on January 31,1958 The Americans won the race to land on the moon more than ten years later with Apollo LLC on July 20,1969."This is one small step for a man one giant leap for mankind,"said astronaut Neil Armstrong the first person to walk on the moon Space exploration has continued since then,and has brought new discoveries in many different areas of science.