On behalf of the entire SETI Institute, we wish one and all a safe and happy holidays and a joyous new year, full of wonder and exploration! -- Bill Diamond, President and CEO (Image credit: Danielle Futselaar)
watch #documentaries on http://docur.co [astrobiology] The famous Drake Equation put forward by Frank Drake back in the 1961. See also "Rare Earth equation" (a somewhat less trusted equation, but interesting nonetheless). ~Al. A.