A company from the Netherlands is planning to send four astronauts on a trip to Mars to set up a human colony in 2023.
Though the company, Mars One, is optimistic about its plan, there are a couple of serious snags, according to the Guardian.
Firstly, when on Mars their
bodies will have to adapt to surface gravity that is 38% of that on Earth.
But this would cause such a serious physiological change in their bone density, muscle strength and blood circulation that voyagers would no longer be able to survive when they get back on Earth.