The head of NASA appealed to Congress on Friday to put more money into restoring America's ability to send astronauts into space instead of relying on Russian rockets.
Aug 29, 2015 in Space Exploration
Since the dawn of aviation, planes have primarily been powered by carbon-based fuels such as gasoline or kerosene. These contain a lot of energy for their weight, providing the vast power required to lift large commercial ...
Aug 25, 2015 in Energy & Green Tech