Visualizing the possibility of intelligent life in the Milky Way

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Originally posted on TED Blog:

David McCandless visualizes the Drake Equation for the BBC

How many detectable alien civilizations are out there in our galaxy? In 1961, astronomer Frank Drake developed an equation to estimate the number. Now data journalist David McCandless, who gave the talk “The beauty of data visualization” at TEDGlobal 2010, has created an information graphic for the BBC calculating the Drake Equation — with a twist. It’s interactive, and you can be as optimistic or skeptical as you like as you set the value of each variable in the equation. Any tinkering leads to highly different conclusions.

Jill Tarter, the head of the SETI Institute, would no doubt set her variables on the optimistic side. Tarter gave the wonderful TED-Ed lesson “Calculating the Odds of Intelligent Alien Life,” which explains the Drake Equation and its many variables. Tarter won the TED Prize in 2009 and called for more people to join the search for extraterrestrial life. “From my perspective…

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