Here are the best places to find ice on Mars

So you want to go live on Mars. It's smaller than Earth, but still has a lot of real estate. Where's the best place to call home?

NASA's mantra has been to follow the water — they're looking for evidence of past life, but for once and future humans, it's still a good idea. Water is heavy and nearly incompressible, so it's very difficult and expensive to take with you to Mars. That means finding it in situ, there on Mars, is critical for success. Also, water isn't just for drinking: It can be br...