The Russians launched the world's first artificial satellite Sputnik I, On October 4,1957 Next,Spunik 2,carrying a dog called Laika,went up into space on November 3.The Americans won the race to land on the moon more than ten years later with Apollo 11 on July 20,1969 "This in one small step for a man one gaint leap for mankind,"said astronaut Neil Armsrtong,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