At NASA, we use the vantage point of space to study Earth and the life it contains. And, so far, our planet is the only one with life (that we know of). The more we learn, the more this question comes into focus: Maybe Earth is the weird one? As we begin the search for alien life, the knowledge and tools NASA developed to study Earth are among our greatest assets. We will discuss how Earth science informs the search for life beyond our planet – on exoplanets and even within our own solar system. So, what do you want to know? We will be back at 4 pm ET to answer your questions, AMA! Morgan Cable is a NASA research scientist searching for life and interesting chemistry on ocean worlds such as Saturn’s moons Enceladus and Titan. Tony Del Genio is a NASA Earth climate scientist and planetary scientist who uses global climate models to understand the kinds of exoplanets that are most likely to be suited to the emergence of life as we know it. He once thought planets orbiting other stars wouldn’t be found in his lifetime, but now he tries not to underestimate exoplanet scientists. Shawn Domagal-Goldman is an astrobiologist at NASA who looks for ways to identify signs of life, and ways to detect those signs from far away using space-based telescopes. Stephen Kane is a planetary astrophysicist at the University of California, Riverside, who has been researching exoplanets for more than 20 years. Andrew Rushby is a NASA astrobiologist who uses computer simulations to try and understand those few planetary environments that could support life in the deathly cold, vacuous expanse of our galaxy. UPDATE @ 3:24 pm ET: A new feature story and video on this topic are now posted at nasa.gov – https://www.nasa.gov/feature/jpl/our-living-planet-shapes-the-search-for-life-beyond-earth UPDATE @ 3:49 pm ET/1:49 pm MT: We are online and ready to start answering questions! In fact, we are all together in Laramie, Wyoming at the Habitable Worlds 2017 workshop. Looking forward to this! https://twitter.com/NASAEarth/status/930903145923989504