231n Life On A Low Gravity Planet March 26 2020, S6E13 Narration Only

Science & Futurism with Isaac Arthur

Isaac Arthur

Science, Futurism, Sci Fi, Future, Scifi, Technology, Space, Engineering

4.8 • 739 Ratings

🗓️ 26 March 2020

⏱️ 23 minutes

🔗️ Recording | iTunes | RSS

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Summary

Science fiction loves to take us to desolate alien worlds with low-gravity, and envision creatures evolved to those or humans adapted to those conditions or zero-gravity in space, and many planets we might one day colonize like Mars do have low gravity... but our assumptions about life on such places correct or what if we're making incorrect assumptions? Don't forget to check out What If's channel: https://bit.ly/youtube-What-If Watch the video version: https://youtu.be/CBLCNWpLFBg Start listening with a 30-day Audible trial and your first audiobook plus two Audible Originals are free. Visit http://www.audible.com/isaac or text "isaac" to 500-500. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: https://www.signil.com/sfia/ Social Media: Facebook Group: https://www.facebook.com/groups/1583992725237264/ Reddit: https://www.reddit.com/r/IsaacArthur/ Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content. SFIA Discord Server: https://discord.gg/53GAShE Credits: Life on a Low-Gravity Planet Episode 231; Mar 26, 2020 Written & Produced by Isaac Arthur Editors: Cassandra Graham Darius Said Jerry Guern Keith Blockus Saida Mir Narrators: Isaac Arthur Peter of What If Get a free month of Curiosity Stream: http://curiositystream.com/isaacarthur The Zoo Hypothesis is a Fermi Paradox solution that assumes extraterrestrial civilizations can't be detected by our SETI efforts because they keep our whole world in an Alien Zoo. Visit our Website: http://www.isaacarthur.net Support us on Patreon: https://www.patreon.com/IsaacArthur SFIA Merchandise available: https://www.signil.com/sfia/ Social Media: Facebook Group: https://www.facebook.com/groups/1583992725237264/ Reddit: https://www.reddit.com/r/IsaacArthur/ Twitter: https://twitter.com/Isaac_A_Arthur on Twitter and RT our future content. SFIA Discord Server: https://discord.gg/53GAShE Listen or Download the audio of this episode from Soundcloud: Episode's Audio-only version: https://soundcloud.com/isaac-arthur-148927746/fermi-paradox-zoo-hypothesis Episode's Narration-only version: https://soundcloud.com/isaac-arthur-148927746/fermi-paradox-zoo-hypothesis-narration-only Credits: The Fermi Paradox: Zoo Hypothesis Episode 228; Mar 5, 2020 Writers: Isaac Arthur Editors: Darius Said Jerry Guern Produced & Narrated by: Isaac Arthur Cover Art: Jakub Grygier https://www.artstation.com/jakub_grygier Graphics: Jeremy Jozwik https://www.artstation.com/zeuxis_of_losdiajana Kris Holland (Mafic Studios) www.maficstudios.com Kristijan Tavcar https://www.miragedereve.com Sergio Botero https://www.artstation.com/sboterod?fref=gc Music: Lombus, "Cosmic Soup" https://lombus.bandcamp.com Aerium, "Waters of Atlantis" & "Fifth Star of Aldebaran" https://www.youtube.com/channel/UCRnUJY3l5vIJFGsY3XvW4dQ Markus Junnikkala, "A Memory of Earth" https://www.markusjunnikkala.com/ See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

Transcript

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0:00.0	Hello, SFIA audio listeners. In this month's Nebula exclusive, Big Alien Theory,
0:05.0	we're asking the reason alien civilizations might be rare is because most aliens are huge.
0:10.0	To hear it and every episode early and add free, plus hours of bonus content,
0:15.0	check out go.nebola.tv slash Isaac Arthur and use my code, Isaac Arthur.
0:20.0	This episode is sponsored by Audible.
0:23.8	In the future, humanity may come to reside on strange new worlds, and likely many will have
0:29.2	lower gravity than Earth.
0:30.9	We may find native life on those worlds or adapt them ourselves, but what would those adaptations
0:36.1	be?
0:38.6	There is a fairly common assumption in science fiction that folks living on low
0:41.9	gravity planets or on spaceships would tend to grow tall and willery, while folks on high
0:46.6	gravity worlds would tend to be squat and muscular.
0:49.8	On initial inspection this seems to make sense.
0:53.0	Trees have evolved to reach up high to get sunlight, above their neighbors and other plants,
0:57.6	and are limited in height largely from issues like weight and fluid pumping, which are obviously
1:01.9	reduced in lower gravity, so it stands to reason they'd be able to get taller if there
1:05.9	was less gravity.
1:07.9	Of course, they also need to be strong enough to resist wind, so where there is more
1:11.2	of that they can't grow as tall.
1:13.7	When we consider places like Mars, with its infamous dust storms, we sometimes forget
1:17.9	that those aren't actually very strong for the speed the air moves at, since the atmosphere
1:22.2	is so thin.
	...

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