Who can look out into space and not ask the age-old question: Are we alone in the universe? Astronomers have already identified dozens of planets beyond the edges of our solar system which could be like our own Earth. Join astrophysicist Lisa Kaltenegger as she explains the different methods astronomers use to detect exoplanets orbiting distant stars, what these planets would need to support life, and how Earth and its range of species might serve as a Rosetta Stone—a key to detecting the existence of extraterrestrial life. This SciCafe program took place at the Museum on November 1, 2017. Watch a video version of this lecture here: https://www.youtube.com/watch?v=Xoze-pkjxZw Read the full transcript of this lecture here: https://www.amnh.org/explore/news-blogs/podcasts/amnh-scicafe-are-we-alone-in-the-universe To learn about upcoming SciCafe events, visit amnh.org/scicafe The SciCafe series is proudly sponsored by Judy and Josh Weston.