My student found an earlier citation! Tobias Owen's contribution to this: https://t.co/FXKEUQ9exW available here: https://t.co/w3gs8UxTX0 Describes biosignature detection via transit spectroscopy, and mentions possibility of detecting CFCs! @haqqmisra @
RT @Astro_Wright: @BerkeleySETI @SETIInstitute All are very readable. The Drake paper in particular is a wonderful time capsule, with a qua…
@BerkeleySETI @SETIInstitute All are very readable. The Drake paper in particular is a wonderful time capsule, with a qualitative argument that would become the Drake Equation when he later quantified it: https://t.co/tTDsG8IY42 @david_kipping
@david_kipping You ask me this hours after I have a long conversation with Frank! I wished I had asked him. So instead of a definitive answer, I'll give you what I cite, which is the best and earliest reference I can find by Frank himself: https://t.co/tTD