The hypothesis that Mercury has abundant water ice and other frozen volatile materials in its shadowed polar craters appears to have been confirmed. NASA announced today that new measurements from its Mercury Surface, Space Environment, Geochemistry and Ranging (MESSENGER) spacecraft …

Fifty years ago today, astronaut John Glenn made history by boarding a Mercury space capsule and becoming the first American to orbit the earth. The Friendship 7 made three orbits around the earth in a little less than five hours …