Fascinating new evidence suggests that Earth might not be as unique as we thought. There could be other planets like Earth. What are the odds that one of these places might have life?
Scientists say that a planet needs to be the right size-- not too big (gas giant), not too small (like the moon, which probably can't support an atmosphere)-- and it needs to be the right distance from its star-- too close and life gets cooked, too far away and things get too cold for life. Just add water to that and, perhaps, just perhaps, alien life forms might be found. Read and enjoy!
