75 billion red dwarf stars may have Earth-size planets orbiting them
This is why I can't fathom people not believing there is other life out there. That's just in our galaxy. It's hard to even comprehend how large the universe is.
Having this many "earth-like" planets does help the case for the possibility of life on other planets. But on the other hand there are so many variables that have to be just right for life to take hold. Not only does a planet have to be in what scientists refer to the "Goldilocks Zone" but there are a whole range of other factors that have to be exactly perfect for there to even be a chance of life. These are;
1. The composition of the atmosphere.
2. The presence of a moon, moons to stabilize the planet's axis as well as oceanic tidal forces.
3. The presence of a large gas giant planet nearby (but not too close) to help safeguard this planet from bombardment from asteroids or comets.
4. Active tectonic plates to maintain the correct balance in the atmosphere as well as control erosion.
These are just the factors I can think of off the top of my head that all must be perfect for there to even be a chance of life. I'm sure there are other factors I'm not thinking of at this moment. So, finding these "earth-like" planets is but the first step of many in determining which of these potentially billions of planets may have life.
Now this not to say there are no other life sustaining planets out there. But considering everything that has to be just right in addition to just being in the right distance from their star, planets with life on them are more than likely extremely rare.