Much has been made about the “impending” end of the world in 2012. There are many ways life on Earth - or in some cases, the Earth itself - might be destroyed. Here are seven scientific theories as to how that might happen.
Most experts believe our sun will eventually supernova in 5 billion years or so, taking much of our part of the solar system with it. But there are other ways life on Earth — or in some cases, the Earth itself — might be destroyed. Here are seven ways that might happen.