It's been a while since our last Q&A so here is a catch up on some your great questions posted on the channel! First, we get into how the trade-off astronomers make between telescope size, time and number. Then, we turn to how to find life which started independently to us and whether we'd even recognize it. We are trying out a new intro and styling, let us know what you think! Thanks for watching! ::More about this Video:: ► "Does Life Start Easily?" Cool Worlds video: https://youtu.be/rtFy48i88A8 ► "How to Characterize Proxima b's Atmosphere" Cool Worlds video: https://youtu.be/zsKoBbY1-S4 ► Project Minerva: https://www.cfa.harvard.edu/minerva/ ► Shadow biosphere Davies et al. (2009), Signatures of a Shadow Biosphere: http://online.liebertpub.com/doi/abs/10.1089/ast.2008.0251 ► Outro music by Taylor Davis: https://www.youtube.com/watch?v=dl9kI1yQKZk ::Playlists For Channel:: Latest Cool Worlds Videos ► http://bit.ly/NewCoolWorlds Cool Worlds Research ► http://bit.ly/CoolWorldsResearch Guest Videos ► http://bit.ly/CoolWorldsGuests Q&A Videos ► http://bit.ly/CoolWorldsQA Science of TV/Film ► http://bit.ly/ScienceMovies ::Follow us:: SUBSCRIBE to the channel http://bit.ly/CoolWorldsSubscribe Cool Worlds Lab http://coolworlds.astro.columbia.edu Twitter https://twitter.com/david_kipping Instagram https://www.instagram.com/cool.worlds THANKS FOR WATCHING!!