50th Anniversary

Three days ago on April 12th 1961, The first human went to space. The flight of Yuri Gagarin is a very important event for man kind and the progression of science. Thinking of how far we went in 50 years (solar sails, the Voyagers and robot explorers) and how far we can go in the next 50 years (manned missions to the moon, mining in space, light speed travel...) I believe that this date could be considered as a turning point in science for 50 years later, we might be celebrating the 100th anniversary of Yuri Gagarin as well as the 25th anniversary for landing on Mars.