SpaceNext-gen Mars orbiters to help human missions become more real NASA has funded studies to investigate how new orbiter spacecraft can best serve a human ground crew on Mars for a potential mission in the 2020s 51¶¯Âþ
PhysicsWater waves travel back in time to retrace their ripples Researchers have discovered that jolting waves can send them rippling back to where they came from like a movie in reverse 51¶¯Âþ