[CorsiHockeyLeague]

Originally Posted by troutman

Why haven't we found aliens?

Most Earth-Like Worlds Have Yet to be Born

http://www.ras.org.uk/news-and-press...yet-to-be-born

Earth came early to the party in the evolving universe. According to a new theoretical study published today (20 October) in Monthly Notices of the Royal Astronomical Society, when our Solar System was born 4.6 billion years ago only eight percent of the potentially habitable planets that will ever form in the universe existed. And, the party won't be over when the sun burns out in another 6 billion years. The bulk of those planets - 92 percent - have yet to be born.

This conclusion is based on an assessment of data collected by NASA's Hubble Space Telescope and the prolific planet-hunting Kepler space observatory.

But this only applies to the observable universe. For obvious reasons, we cannot observe whether this is true of regions outside of the observable universe.