Manned Mars mission plans include a radiation shield made of poop

Now that millionaire space tourist Dennis Tito has officially announced his intention to send a man and a woman on a round-trip journey to Mars in 2018, a few more details are trickling out about the Inspiration Mars project. One such detail is how the Inspiration Mars team plans to protect its astronauts from cosmic… » 3/02/13 2:00pm 3/02/13 2:00pm

Can humans journey into deep space without cosmic radiation frying our …

Beyond a few brief trips to the Moon over four decades ago, humanity has never ventured outside of Earth's protective magnetic field. And while it's natural to dream of exploring the stars, such voyages may carry impossibly high medical risks. » 1/01/13 9:00am 1/01/13 9:00am