CW Doomerism:
Funny to think that the humble horseshoe crab will appear 250 ticks on this scale. Then all of a sudden in one single tick, humans appear and in the next they're probably extinct along with 99.99% of the other species.
this post was submitted on 19 Aug 2024
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Breadtube if it didn't suck.
Post videos you genuinely enjoy and want to share, duh. Celebrate the diversity of interests shared by chapochatters by posting a deep dive into Venetian kelp farming, I dunno. Also media criticism, bite-sized versions of left-wing theory, all the stuff you expected. But I am curious about that kelp farming thing now that you mentioned it.
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Sometimes I think about new life refilling the earth millions of years from now, like the dinosaurs after the Permian extinction. It sucks to witness a mass extinction but in the long timeline it’s only an instant. Just happens to be an instant my entire life fits inside of
How do they figure this out?
Mostly by looking at patterns across continents. For example the Appalachian mountains and Scottish highlands were once part of the same mountain range. Geologists were able to figure that out by closely examining those mountain ranges. With enough patterns like that you can start to reconstruct the plate movement.
Plus there's a handful of things we know are absolutely true, like California moving x inches per year because we have very accurate measuring
Then you can extrapolate
I recently learned a really weird piece of evidence geologists apparently look at: heavy oxygen trapped in rocks. Turns out water with oxygen18 is slower to evaporate than water with the lighter oxygen16, which apparently means that rocks absorb oxygen18 water more readily than oxygen16 water, and therefore landmasses tend to accumulate oxygen18 leaving less in the seas... which means, when geologists find really old sea floor rocks full of oxygen18, it suggests that there was a lot more oxygen18 in the seas back then, which suggests that there was very little dry land to absorb oxygen18, meaning ancient earth might have been a water world, which is what we see in the start of the video.
https://www.astronomy.com/science/ancient-earth-may-have-been-a-water-world-with-no-dry-land/
*which also has obvious implications for the origins of life, as the article mentions—none of Darwin's "warm little ponds"
I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy: