this post was submitted on 27 Feb 2024
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Science Memes

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[–] [email protected] 134 points 9 months ago* (last edited 9 months ago) (6 children)

People only figured out the mechanics of plate tectonics relatively recently. However, they started noticing that the continents looked like they had fit together as soon as they had accurate maps to look at. In the late 1500's

Abraham Ortelius in his work Thesaurus Geographicus … suggested that the Americas were "torn away from Europe and Africa … by earthquakes and floods" and went on to say: "The vestiges of the rupture reveal themselves, if someone brings forward a map of the world and considers carefully the coasts of the three [continents]."

Wikipedia link.

[–] [email protected] 42 points 9 months ago

Exactly!

While the continents might look like they fit together, and the rock types and ages and fossils match at key points all down the coasts from Canada/Scotland all the way down to South America and South Africa, how on earth (sorry) would you explain how the continents are thousands of miles apart?

One theory posited the earth spinning so fast centrifugal forces ripped ehat would become the moon out of the Pacific, sucking Eurasia and America into the void.

That's a Randall Monroe WhatIf if ever I saw one. Think of the energy involved! All life on earth would be extinct.

So these theories were laughed out of scientific court. Until Vine and Matthew's seminal paper on magnetic stripes being mirrored over the mid ocean ridge showed there had to be something forcing the plates apart.

[–] [email protected] 6 points 9 months ago

That’s cute honey, would you like an internet.

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[–] [email protected] 74 points 9 months ago* (last edited 9 months ago) (2 children)

Alfred Wagner proposed the idea of plate tectonics decades before this, citing the fit of the continents, the same species of plants and animals on continents separated by ocean, and glacial striations as evidence. The problem was that no one knew HOW the plates separated.

[–] [email protected] 16 points 9 months ago (4 children)

He actually described the continents as scraping across an ancient and immobile seafloor. This was deemed mechanically implausible and contributed greatly to the rejection of Continental Drift. If Al stuck with his detailed phenomenological approach, there may have been wider adoption of his detailed and careful observations.

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[–] [email protected] 11 points 9 months ago (1 children)

Plates that move? Psh, Id rather propose that a whole continent called Lemuria just vanished.

[–] [email protected] 6 points 9 months ago* (last edited 9 months ago) (2 children)

Plants do move. Have you never seen a dandelion blowing in the wind or an acorn fall from a tree.

[–] [email protected] 12 points 9 months ago

I'M HIT! POW POW POW POW POW POW POW POW

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[–] [email protected] 63 points 9 months ago (1 children)

I remember the day I realized that Africa and South America fit together when looking at a paper atlas. It felt like I had just discovered something incredible. I guess I had, but I wasn't the first. :-)

[–] [email protected] 72 points 9 months ago (2 children)

This happens a lot on mathematics, you figure out something that it's looks incredible just to find out Euler already found it centuries ago.

[–] [email protected] 12 points 9 months ago

That's why they name things after the second person to discover it - Euler was inevitably the first.

[–] [email protected] 10 points 9 months ago

Its always nice when it’s someone other than Euler

[–] [email protected] 52 points 9 months ago (4 children)

Darwin believed one of the more popular explanations of his time: expanding Earth theory. Basically, the planet was like an expanding dough ball. It decently explained why things looked like they fit together. Darwin even went out to Patagonia to investigate some cliffs, and basically "confirmed" the theory.

[–] [email protected] 35 points 9 months ago (1 children)

So Darwin was trying to explain how creatures with common lineage appeared both sides of an ocean. He "proved" that the land masses were once joined. He didn't really care so much about "how" they were joined, but it was vital to his theory of evolution that they were.

[–] [email protected] 11 points 9 months ago

Oh, definitely. It's also worth noting that he definitely wasn't a geologist, despite having an interest in it. I was mostly just mentioning it because there were theories trying to explain the similarities across landmasses before plate tectonics. We may not always be right about why, but we're really good at noticing stuff like that (even when it doesn't mean anything).

[–] [email protected] 18 points 9 months ago

"yep, that pretty far"

[–] [email protected] 7 points 9 months ago (1 children)

Wouldn’t Darwin have already known that the Greeks had calculated the circumference of the earth like 2000 years before him?

[–] [email protected] 23 points 9 months ago (2 children)

A slow enough rate of expansion would make 2000 years negligible. Same with plate tectonics.

[–] [email protected] 9 points 9 months ago

And like it was Darwin, I can give him a pass on not knowing the time scale of speciation

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[–] [email protected] 48 points 9 months ago (4 children)

I'm really bothered by this line of thinking.

Just because something "looks" like it is a certain way doesn't mean it is. For anything to be considered fact there needs to be evidence. The hypothesis that the Earth may have plate tectonics existed decades before it became fact.

This leads people to make connections between completely unrelated things, despite scientists, or professionals working in fields of science (i.e. doctors), saying, and often proving, there is none.

[–] [email protected] 4 points 9 months ago

Sure we are pattern matching machines. We had to be the humans that couldn't figure out "big scary noise usually means big scary threat" died off.

My hat goes off to all the great minds in the sciences that can not only overcome this tendency but using it AT THE SAME TIME!

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[–] [email protected] 39 points 9 months ago (1 children)

Using our understanding of the fundamental elements and atomic particles, we can create weapons capable of destroying the entire earth.

How was earth made though?

Fuck, we don't know. We'll stick with God.

[–] [email protected] 26 points 9 months ago (4 children)

I mean, figuring out how to destroy something is always easier than how to create

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[–] [email protected] 20 points 9 months ago (1 children)

It also took a climatologist or something and nobody believed him. Probably because a lot of science stubbornly gravitated around religious stupidity of some kind.

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[–] [email protected] 13 points 9 months ago

This is a story I am going to repeat forever.

When I was taking one of my science classes for my major our professor mentioned that she is pretty convinced that she was the last holdout geologist for this theory. So not only had this been discovered in recent history it was controversial in recent history.

[–] [email protected] 9 points 9 months ago (2 children)

bro, you dont need to post screenshots of twitter. just steal the post, no one cares.

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[–] [email protected] 5 points 9 months ago (1 children)

Makes me wonder what other "obvious things" we don't know yet

[–] [email protected] 3 points 9 months ago

That wearing a mask reduces the spread of airborne diseases.

[–] [email protected] 3 points 9 months ago

Continental drift had been proposed way before this. The mechanism was unknown.

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