A fuel cell is a device that generates electric energy through electrochemical reactions between an oxidizing agent and a fuel – a material that stores energy in chemical form. Both species are ...
Liquid hydrogen could become the fuel for some future aircraft, such as the concept pictured. For liquid hydrogen, the tanks would be fuselage-installed and designed to maintain a cryogenic ...
Beyond the search for life, knowing that Mars had liquid water has practical implications for future human missions. Water is a crucial resource for astronauts, not only for drinking but also for ...