“A few months before he died, Carl Sagan recorded a message of hope to would-be Mars explorers, telling them: ‘Whatever the reason you’re on Mars is, I’m glad you’re there. And I wish I was with you.’ On Monday, 17 years after the pioneering astronomer set out his hopeful vision of the future in 1996, a company from the Netherlands is proposing to turn Sagan’s dreams of reaching Mars into reality. The company, Mars One, plans to send four astronauts on a trip to the Red Planet to set up a human colony in 2023. But there are a couple of serious snags.”
