Comment Re:Suggests abiogenesis is easy (Score 1) 86
That's actually a pretty good time range - Sun-like stars in the Galactic Habitable Zone have been around for about 9 billion years, and if we assume Earth's 4.5 billion year history is typical, 5 billion years ago is about as far back as you'd expect to find little green men.
We are on the verge of being able to scan the atmosphere of exoplanets in bulk. It won't be that long (relatively speaking) before we'll know if there are any planets in our sky with chemistry that suggests a living biosphere. I hope to live long enough to see the results.