News Space The Drake Equation Turns 50: An interview with Frank Drake Astronomer's insight led to equation that quantifies extraterrestrial civilizations in the Milky Way Share this:FacebookTwitterPocketRedditPrintEmail By Nadia Drake November 1, 2009 at 3:23 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe