1. Mars is our closest neighbor that would be the most habitable for humans.

2. Is this a smoking gun that this was a habitable environment?

3. Most of the new planets, not just those in the habitable zone, are small.

4. Scientists typically define planets as potentially habitable if their surfaces are warm enough to sustain liquid water on their surfaces.

5. However, researchers have proposed a way to make Mars more habitable by creating an artificial magnetic field to reduce radiation levels.

6. And more than 40 of them seem to be in the habitable zone.

7. So far Kepler has found nine exoplanets in the habitable zone, NASA said.

8. Some owners of damaged residences have demanded the government buy back apartments that may no longer be habitable due to chemical contamination.

9. It is therefore very tempting to imagine that life could exist in such a habitable realm, a billion miles from our home.