Humans will be on Mars within 20 years: British astronaut

British astronaut Tim Peake has said that Elon Musk and his space exploration startup SpaceX could put humans on Mars by 2040. Peake added that the Deep Space Gateway, a space station project by multiple agencies including NASA, European Space Agency and Roscosmos (of Russia) that aims to launch manned missions to Mars, would be vital for furthering space exploration.