What if All Life on Earth Died and Now We Fast Forward a Billion Years?

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If life had existed on Mars, what would be the signs we would look for? That's a very good question. The thing is that if you draw the parallel with Earth, it took 82% of Earth history to go from very simple life, microbial life, to complexity. So even though oxygen changes our signature today, what if all life on Earth died and now we fast forward a billion years,What would be the traces left?

Nathalie Cabrol is an astrobiologist at the SETI Institute, directing the Carl Sagan Center for the Study of Life in the Universe. Please support this podcast by checking out our sponsors:
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In Her Orbit (article): https://nytimes.com/interactive/2018/03/22/magazine/voyages-nathalie-cabrol-searching-mars-life-on-earth.html

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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
(06:47) – Working in extreme environments
(11:26) – Water and life on Mars
(19:31) – Origin of life
(37:00) – Complexity
(40:37) – AI
(49:23) – Extinction
(57:06) – Fermi Paradox
(1:10:48) – SETI research
(1:13:39) – Diving in volcanic lakes
(1:32:57) – Surviving an earthquake on a volcano
(1:43:37) – Resilience of life
(1:51:31) – Life below the surface of Mars
(2:00:26) – Depression
(2:04:08) – Mortality