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

Ultra-powerful, super short cosmic explosions could ravage life on Earth

In the ultimate cosmic cataclysm, two ultra-dense bodies collide. For less than a second, incredible amounts of super-charged particles explode forth. These blasts could wipe out most life on Earth...and it's probably happened dozens of times already. » 10/09/11 12:45pm 10/09/11 12:45pm

We could be running out of time to send astronauts to Mars

America's current plans for human space exploration seem horribly slow, considering we won't leave Earth's orbit until 2025 and won't reach Mars until 2035. Worse than that, solar radiation spikes could keep us grounded for decades more. » 11/05/10 8:00am 11/05/10 8:00am