posted on Jun, 13 2009 @ 05:05 AM
In a billion years!!
the last para says
"It didn't take very long to produce life on the planet, but it takes a very long time to develop advanced life," says Yung. On Earth, this process
took four billion years. "Adding an additional billion years gives us more time to develop, and more time to encounter advanced civilizations, whose
own existence might be prolonged by this mechanism. It gives us a chance to meet."
So at least they seem to take it as granted there is advanced life out there - and this in a physics website.