Ever since humans first started to open their eyes some 200,000 years ago, we've looked up at the night sky and wondered what all was out there? As science and technology progressed we were able to learn more and more about the natural world beyond the Earth. So, the big question currently is how many habitable planets are out there?
Submitted by Prabir.Mehta on November 12, 2013
Is the world ending on Dec 21, 2012? The Mayan Calendar says it is, but if you look into the physics, astronomy, geology, and chemistry behind this prediction you may notice a different outcome!