I know one theory proposes comets seeded earth with essential materials. But what seeded comets?? It’s just chance with extra steps, no?

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malfist 4 hours ago | parent | next [-]

The big bang did. And following it, supernovae. But there's a lot we don't know and science is always advancing!

For example, JWST observed early galaxies are both larger and more diverse materials than we expected. Means there's something new to learn!

	▲	flag_fagger 3 hours ago \| parent [-]
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anechouapechou 2 hours ago | parent | prev | next [-]

There's a theory that at the very beginnings of the universe, as it cooled down, there was a period where the average temperature of the universe was between 0-100º C, meaning the whole universe was within a "habitable" temperature range, and this could have supercharged the creation of the building blocks of life. I think I learned about it on a Veritasium video... Maybe someone knows which one? :)

	▲	Retric 2 hours ago \| parent \| next [-]
		Veritasium videos are often extremely misleading. In this case the cooling universe lacked carbon for these organic compounds. Life cares about 0-100c because of water which depends on Oxygen would be missing etc. Just as example in one video he refers to the field outside of the wire carrying the energy for electricity, however EM waves propagate at the speed of light and fall off at the square of distance. Electricity can travel thousands of miles without that kind of falloff but doesn’t propagate as fast because it’s electron density in the wires that causes what we think of as electricity. He then setups up an antenna and … well you get the idea.
	▲	tsimionescu an hour ago \| parent \| prev [-]
		A "habitable" temperature range, without water and carbon, would be entirely meaningless.

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gaoshan 3 hours ago | parent | prev | next [-]

When Carl Sagan said, "The cosmos is within us. We are made of star-stuff. We are a way for the universe to know itself" he was poetically accurate. The comets are seeded with the remains of untold countless exploded stars.

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antonvs an hour ago | parent | prev | next [-]

It's sorting and mixing. Comets, asteroids, and planets all had different factors governing their formation (sorting). When comets or asteroids hit planets, you get a mixture of those different compositions.

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mollusc-engine 2 hours ago | parent | prev | next [-]

Wait till you hear about God!

	▲	mollusc-engine 37 minutes ago \| parent [-]
		[flagged]

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lorenzohess 2 hours ago | parent | prev [-]

God