Oceans, Continents & Plate Tectonics: Keys to Civilizations & Aliens - Stern & Gerya, AGU 2024

[@robertmoye7565]

Well reasoned, informative.

[@Azathoth_TheDameonSultan]

more people need to see this, this was a great video

[@sentientflower7891]

Alone in our galaxy and alone in the Universe. Not merely alone in the sense of no other technological civilizations existing but no other living planet in the Universe, at all. The total of the L value for the Universe in this context is equivalent to the lifespan of technological civilization on the Earth and that's a very small number, alarmingly small.

[@metal87power]

Well reasoned, but is it universal? Pun not intended. For our life on Earth, carbon based life. But maybe carbon life cab emerge also without plate tectonics or water, maybe rich minerals could envelop the planet by vulcanism or from comets. And in the end, maybe there is non-carbon intelligent life.