Elon Musk says astronauts could land on Mars within just four years

Elon Musk has said that astronauts could land on Mars within just four years, as NASA faces pressure over its delayed plans to land on the moon. Space X will launch its first uncrewed Starships to Mars in two years when the next Earth-Mars transfer window opens - which is the point at which Earth and Mars are closest - to test the reliability of landing intact on Mars. If these tests are successful, Space X, which Mr Musk founded in 2002, will launch crewed flights to Mars in four...