Rate of Earth-sized habitable zone planets

[Drashner1]

Neat stuff! Personally, I suspect we will eventually that life is as common as doorknobs - a huge number of lifebearing worlds, often of a sort we haven't predicted - but that the number of non-lifebearing worlds will be vastly larger - and the overall numbers are so huge that it will initially seem to take a while to find each one individually. A million needles in a haystack of a trillion pieces of hay so to speak.

Todd