The Structure of the Causal Chains

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If you look at the structure of two interacting living things populations and they have independent origins for their causal chain, then one is alien. So that's why you would even define them as alien. The question we're all interested in is how many independent origins of a complexifying causal chain are there in the universe? And would all alien civilizations have an evolutionary process on a planet?

Sara Walker is an astrobiologist and theoretical physicist. Lee Cronin is a chemist. This is a conversation and debate about alien life and alien civilizations. Please support this podcast by checking out our sponsors:
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EPISODE LINKS:
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Lee’s Twitter: https://twitter.com/leecronin
Lee’s Website: https://www.chem.gla.ac.uk/cronin
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OUTLINE:
Here’s the timestamps for the episode. On some podcast players you should be able to click the timestamp to jump to that time.
(00:00) – Introduction
(07:47) – Aliens
(21:53) – What is life?
(29:35) – Assembly theory
(52:03) – Math
(1:03:45) – Communication with aliens
(1:28:38) – Evolution of the universe
(1:37:56) – Creating alien life
(1:45:29) – Origin of life
(1:52:29) – Before the Big Bang
(1:59:22) – God
(2:09:39) – Goal-directed behavior
(2:27:37) – Time
(2:35:54) – Free will and imagination
(2:51:06) – UFO sightings
(2:56:06) – Alien life forms debate
(3:11:14) – Robots
(3:20:29) – Love and emotion
(3:38:55) – Beauty in science
(3:49:06) – Random questions
(3:58:30) – Advice for young people
(4:01:48) – Life on Earth
(4:06:12) – Memory