The Drake Equation tells us the likelihood that there are other advanced technological civilizations waiting for us among the stars. In this episode of Space Time we challenge you to use the Drake Equation to help us determine how near or far these alien races may be. Links to reference material below. Get your own Space Time t­shirt at http://bit.ly/1QlzoBi Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Support us on Patreon! http://www.patreon.com/pbsspacetime Help translate our videos! null Everything we’ve learned about our universe tells us that it is very unlikely we are alone. Frank Drake and his Drake Equation compute exactly how unlikely this is. The answer may surprise you. Written and hosted by Matt O’Dowd Produced by Rusty Ward Made by Kornhaber Brown (www.kornhaberbrown.com) A New Empirical Constraint on the Prevalence of Technological Species in the Universe Adam Frank & W.T. Sullivan III https://arxiv.org/abs/1510.08837 The Drake Equation http://www.seti.org/drakeequation G-type stars within 100 light years http://www.solstation.com/stars3/100-gs.htm Prevalence of Earth-size planets orbiting Sun-like stars Erik A. Petigura, Andrew W. Howard, Geoffrey W. Marcy https://arxiv.org/abs/1311.6806 The Kepler Sample http://kepler.nasa.gov/science/about/targetFieldOfView/ Planet Hunters X. KIC 8462852 - Where's the Flux? Tabby. S. Boyajian, et al. https://arxiv.org/abs/1509.03622