Terraforming a Second Earth
It might be about time to trade in this old Earth for a newer model. There are a few good candidates that are relatively close, with Mars and Venus having the best base to start from. But terraforming a planet isn't easy, takes a long time, and — oh yeah — it's never been done. While dreaming of moving an entire civilization to another planet might sound neat, starting here on Earth might be a little more realistic.