72: Origins of Water and Organic Molecules in Space4. Greg Brennecka explores the origins of life's ingredients, noting that Earth, Mars, and meteorites are fundamentally made of the same materials, with meteorites delivering complex organic molecules contai

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John Batchelor

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🗓️ 10 November 2025

⏱️ 10 minutes

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Summary

Origins of Water and Organic Molecules in Space4. Greg Brennecka explores the origins of life's ingredients, noting that Earth, Mars, and meteorites are fundamentally made of the same materials, with meteorites delivering complex organic molecules containing carbon. While life needs rock, energy, and water, scientists suspect Earth's water may have settled back after being liberated during the moon-forming impact, but meteorites still contributed significant building blocks in the form of pre-made ingredients like amino acids and nucleotides (adenine, guanine, and uracil) that formed in the outer solar system. Delivered in a "ready to go kit," these components simplify the emergence of life, and Brennecka stresses the need for continued missions to retrieve pristine asteroid samples to better understand our origins.

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0:39.3	how rocks from space led to life, culture, and Donkey Kong. We see on the world's world
0:44.3	life because we've established that there's a way of saying what happened before the moon
0:49.3	and after the moon. Right now, Greg, I need a definition. What is a complex organic molecule?
0:56.0	Well, a complex organic molecule is a molecule that contains carbon, usually some hydrogen bonded to it.
1:04.0	And then when it becomes complex, I guess it gets a little bicker than just carbon and hydrogen.
1:10.0	So, you know, the definition is quite fuzzy about what complex means, but it just means
1:14.8	something that's got a little bit more to it than just carbon and hydrogen, I guess.
1:18.9	And the reason we're looking at them is because the word organic is highly suggestive.
1:25.2	However, we don't have the, at this point, we don't have the formula
1:30.8	that we need to put together organic molecules, amino acids, and meteorites. But it would
1:38.8	appear that you have the elements for it. That's from reading your reporting. You don't go any farther than that.
1:45.2	You just say that you have these elements, which is why the question is, were they here on
1:50.2	earth when the earth was built? Did they come from meteorites? But Greg, you've taught me
1:56.8	that Earth and Mars and the asteroid belt and the meteorites that fall upon us and even
2:03.8	the commas that come in from the Earth Cloud, we're all made of the same thing. Is that correct?
2:08.6	Essentially, yeah. So, you know, different elements are going to be concentrated in different areas.
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