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Effect of a giant meteorite impact on Paleoarchean environment and life

(www.chemistryworld.com)
133 points kristianp | 1 comments | 17 Nov 24 00:02 UTC | HN request time: 0s | source
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EGreg[dead post] ◴[17 Nov 24 00:55 UTC] No.42161012[source]▶
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dan353hehe ◴[17 Nov 24 00:59 UTC] No.42161033[source]▶
> Drabon and her colleagues went in search of evidence of ancient major impacts in a remote area south of Kruger National Park in South Africa. There they sought out rocky outcrops containing a layer of spherules – molten droplets formed following a major meteorite impact that rained down over huge swathes of the planet. There are eight such spherule bands in this area, each preserving an ancient impact event.

> While the impact crater itself is long gone, analysis of rocks from 3.26 billion years ago tells a tale of planetary devastation. The layer of spherules from this huge impact was 15 to 20cm thick in places, compared with less than a centimetre for the famed dinosaur-killing meteorite, says Drabon.

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EGreg[dead post] ◴[17 Nov 24 02:20 UTC] No.42161463[source]▶
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1. andrewflnr ◴[17 Nov 24 03:02 UTC] No.42161660[source]▶
> Yeah, but it's just a theory that tries to fit this data. Doesn't mean it is correct.

Yes. What else do you expect from science, or really from any human attempt to find truth? Are you just upset they don't include the caveat "subject to potential future evidence or better theories" on literally every single piece of science journalism? Are you upset that people do their best to make sense of weird situations and then tell people about their work, even if it's not absolute truth? What do you want to happen here?