this post was submitted on 13 Mar 2024
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Science Memes

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14
Waka waka (mander.xyz)
submitted 7 months ago by [email protected] to c/[email protected]
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[–] [email protected] 1 points 7 months ago (3 children)

Can it properly be said to be one stone once it got through the atmosphere?

[–] [email protected] 0 points 7 months ago

I doubt the atmosphere had much chance to break it up much since it was 10-15 km wide. Not like the little Chelyabinsk.

[–] [email protected] 0 points 7 months ago (1 children)

eh, seems like a technicality that you could reasonably argue either way

[–] [email protected] 0 points 7 months ago

Aka perfect fodder for wasting time on Lemmy.

[–] [email protected] 0 points 7 months ago

Of course, it's like my f+#-: kidney stone. If it was just a bunch of chunks from the start I wouldn't have pissed blood.

[–] [email protected] 0 points 7 months ago

Best KDR in history folks

[–] [email protected] 0 points 7 months ago

[email protected]

[–] [email protected] 0 points 7 months ago (1 children)

yuge stone

[–] [email protected] 0 points 7 months ago (1 children)

Best stone

[–] [email protected] 0 points 7 months ago

Everybody's saying it.

[–] [email protected] 0 points 7 months ago (1 children)

I thought it made birds with one stone

[–] [email protected] 2 points 7 months ago (3 children)

In case anyone genuinely has this misconception: birds branched off from the other dinosaurs during the Jurassic, probably over 100 million years before the astroid hit. Dinos didn’t suddenly grow feathers and a beak because a big rock hit them.

[–] [email protected] 0 points 7 months ago (1 children)

Interesting! Have we identified the last common ancestor of all modern birds yet? Or at least an estimate of when it would have lived?

[–] [email protected] 0 points 7 months ago (1 children)

It seems quite a few modern birds (Aves) lineages survived the K-Pg extinction (at least 5, last I checked), but when exactly they diversified is apparently still a contentious issue. The common ancestor almost definitely lived sometime during the cretaceous, so not THAT long ago in the grand scheme of things, but it definitely lived either before or during T-rex’s reign.

I was referring to Avialae, which is the clade defined as all dinosaurs more closely related to budgies than to deinonychus. Many of them would have seemed quite birdy to us, but like the other dinosaurs not many of them made it to the current day and the ones that did are all Aves.

[–] [email protected] 1 points 7 months ago

It seems quite a few modern birds (Aves) lineages survived the K-Pg extinction (at least 5, last I checked)

Cool! Do we know how modern birds relate to these 5 lineages? (i.e. which branch became sparrows, ducks, ostriches, etc.?)

[–] [email protected] 0 points 7 months ago

I did not know this.

[–] [email protected] 0 points 7 months ago (1 children)

It would be cool though, if they did

[–] [email protected] 0 points 7 months ago

Now my head cannon is that's exactly what happened.

[–] [email protected] 0 points 7 months ago

Stroke of genius