I understand what some of the people here are trying to say. While we SPECULATE that Mars can/has supported life at one time, we KNOW that Earth can. It's a fact. So really, a LOT more effort should be expended using NASA's amazing accomplishments to fix what we KNOW we'll be able to live on, rather than keep exploring a hypothetical "what if we could" with Mars.

Then again, it's amazing that they're trying to understand our universe more. I'm sure it will benefit us somehow, I just wish people would be more interested in our OWN planet more. I mean, think of how much of the ocean is unexplored! Every time they do a deep dive, they discover something new. Or in the jungles. I personally find it more fascinating to see what lurks in the unknowns of our own planet.