this post was submitted on 07 Oct 2024
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Science Memes

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[–] essteeyou@lemmy.world 228 points 14 hours ago (3 children)

Polaris is 45-67 million years old.

The oldest total-group chondrichthyans, known as acanthodians or "spiny sharks", appeared during the Early Silurian, around 439 million years ago.

It's not even close.

[–] ChicoSuave@lemmy.world 60 points 13 hours ago (2 children)

Dinosaurs died off 65 MYA. Dinosaurs were most likely gone before Polaris formed.

[–] i_stole_ur_taco@lemmy.ca 49 points 11 hours ago (1 children)

They probably died off because they couldn’t use Polaris for navigation!

[–] mkwt@lemmy.world 19 points 11 hours ago (1 children)

Polaris goes in and out of North Star status on the 26,000 year precession cycle. So for the duration of humanity (let's say 100,000 years), there have been decent chunks of time where it's not in use.

[–] sorrybookbroke@sh.itjust.works 10 points 8 hours ago (2 children)

You gotta rest up man, that's a pretty big job for one star

[–] Tar_alcaran@sh.itjust.works 2 points 7 hours ago

They trade off. There are other stars that make for good pole star candidates

[–] FuglyDuck@lemmy.world 9 points 7 hours ago

Can you imagine having to give directions to a bunch of illiterate primates? Ugg. I’d have quite after the first thousand years.

[–] aeronmelon@lemmy.world 12 points 11 hours ago (2 children)

I’m now sad that dinosaurs could never look up and see Polaris.

[–] stewie3128@lemmygrad.ml 4 points 9 hours ago

Most nights even I can barely see Polaris.

[–] ZeffSyde@lemmy.world 1 points 3 hours ago

Eh, they got to see the thousands of other stars that are now obscured by light/atmospheric pollution.

[–] toynbee@lemmy.world 22 points 7 hours ago

I came here to question whether that claim is true, saw your post, and thought something like "well, that settles that." Then I scrolled down and saw neatchee's (great username) post and now my whole world is uncertain.

[–] LustyArgonianMana@lemmy.world 2 points 8 hours ago

Appalachian mountains are even older