#198 – Sara Walker: The Origin of Life on Earth and Alien Worlds

About this episode

<p>Sara Walker is an astrobiologist and theoretical physicist interested in the origin of life. Please support this podcast by checking out our sponsors:<br /> &#8211; <b>Athletic Greens</b>: <a href="https://athleticgreens.com/lex">https://athleticgreens.com/lex</a> and use code LEX to get 1 month of fish oil<br /> &#8211; <b>NetSuite</b>: <a href="http://netsuite.com/lex">http://netsuite.com/lex</a> to get free product tour<br /> &#8211; <b>Blinkist</b>: <a href="https://blinkist.com/lex">https://blinkist.com/lex</a> and use code LEX to get 25% off premium<br /> &#8211; <b>Magic Spoon</b>: <a href="https://magicspoon.com/lex">https://magicspoon.com/lex</a> and use code LEX to get $5 off</p> <p><b>EPISODE LINKS:</b><br /> Sara&#8217;s Twitter: <a href="https://twitter.com/Sara_Imari">https://twitter.com/Sara_Imari</a><br /> Sara&#8217;s Website: <a href="http://emergence.asu.edu/">http://emergence.asu.edu/</a></p> <p><b>PODCAST INFO:</b><br /> Podcast website: <a href="https://lexfridman.com/podcast">https://lexfridman.com/podcast</a><br /> Apple Podcasts: <a href="https://apple.co/2lwqZIr">https://apple.co/2lwqZIr</a><br /> Spotify: <a href="https://spoti.fi/2nEwCF8">https://spoti.fi/2nEwCF8</a><br /> RSS: <a href="https://lexfridman.com/feed/podcast/">https://lexfridman.com/feed/podcast/</a><br /> YouTube Full Episodes: <a href="https://youtube.com/lexfridman">https://youtube.com/lexfridman</a><br /> YouTube Clips: <a href="https://youtube.com/lexclips">https://youtube.com/lexclips</a></p> <p><b>SUPPORT &#38; CONNECT:</b><br /> &#8211; Check out the sponsors above, it&#8217;s the best way to support this podcast<br /> &#8211; Support on Patreon: <a href="https://www.patreon.com/lexfridman">https://www.patreon.com/lexfridman</a><br /> &#8211; Twitter: <a href="https://twitter.com/lexfridman">https://twitter.com/lexfridman</a><br /> &#8211; Instagram: <a href="https://www.instagram.com/lexfridman">https://www.instagram.com/lexfridman</a><br /> &#8211; LinkedIn: <a href="https://www.linkedin.com/in/lexfridman">https://www.linkedin.com/in/lexfridman</a><br /> &#8211; Facebook: <a href="https://www.facebook.com/lexfridman">https://www.facebook.com/lexfridman</a><br /> &#8211; Medium: <a href="https://medium.com/@lexfridman">https://medium.com/@lexfridman</a></p> <p><b>OUTLINE:</b><br /> Here&#8217;s the timestamps for the episode. On some podcast players you should be able to click the timestamp to jump to that time.<br /> (00:00) &#8211; Introduction<br /> (07:44) &#8211; Origin of life<br /> (15:38) &#8211; Did aliens seed life on Earth?<br /> (20:48) &#8211; What is life?<br /> (32:27) &#8211; Cellular automata<br /> (36:56) &#8211; The laws of physics may change with time<br /> (46:41) &#8211; Nobel Prize for the origin of life<br /> (52:01) &#8211; Is consciousness fundamental to the universe?<br /> (1:03:19) &#8211; Life is the most deterministic part of physics<br /> (1:05:54) &#8211; Free will<br /> (1:14:11) &#8211; How to detect alien life<br /> (1:28:48) &#8211; How many alien civilization are out there?<br /> (1:35:32) &#8211; Shadow biosphere<br /> (1:41:59) &#8211; UFO sightings<br /> (1:45:35) &#8211; Exponential population growth of AI lifeforms<br /> (1:52:42) &#8211; The role of death in life<br /> (1:56:45) &#8211; Advice for young people<br /> (2:02:31) &#8211; Meaning of life</p>