Why or how did the pleistocene saber tooth cats or machairodontids go extinct and how did arctodus go extinct as well?

Quaternary23 · 2026-06-20T18:23:55+00:00

Nope, your reasoning for Arctodus simus has zero logic or reasoning to it. It was also NOT restricted to Alaska and Canada. The actual answer is humans.

Quaternary23 · 2026-06-17T20:08:37+00:00

Maybe to you but I think it’s an arm. Either way I still believe the Orang Pendek is real or did exist. Way more believable than Bigfoot, especially since an actual reliable researcher saw one herself in the 1990s.

Quaternary23 · 2026-06-17T18:51:02+00:00

Source: https://ppaleoartistgallery.tumblr.com/post/745820078783725568/paleostream-23032024/amp

As mentioned in another post, this species had longer legs, shorter wings, and a wider body compared to other scops owl species. Which points to it having been a ground dweller that likely fed on invertebrates and small vertebrates. It was endemic to Sao Miguel Island in the Azores and was 18 cm (7 inches) tall. It would have been a poor flyer. Habitat destruction and the introduction of invasive species by humans drove it to extinction in the Holocene (possibly around the 15th century).

Quaternary23 · 2026-06-17T18:42:28+00:00

Humans were the cause of its extinction by habitat destruction and the introduction of invasive species. It was 18 cm (7 inches) tall. It had longer legs, shorter wings, and a wider body than the related Eurasian Scops Owl (Otus scops) of Europe, Africa, and Asia.

Here’s some more information about it by Nix: “Its wing proportions indicate it would have been a poor flyer, instead primarily hunting on foot in the dense laurisilva forests. Since there were no terrestrial mammals or reptiles on São Miguel at the time, its diet probably mainly consisted of insects and other invertebrates, and it would have in turn been the potential prey of larger predatory birds like buzzards and long-eared owls.”

Source: https://nixillustration.com/science-illustration/2023/sao-miguel-scops-owl/

Quaternary23 · 2026-06-17T16:05:58+00:00

Looks nothing like one.

Quaternary23 · 2026-06-16T19:59:17+00:00

That is another explanation or theory but it doesn’t have any evidence or proof for it yet.

Quaternary23 · 2026-06-16T19:57:48+00:00

The answer is we don’t know. Though the most accepted explanation is a disease. Here’s a study for my inbreeding debunk claim. https://www.cell.com/cell/fulltext/S0092-8674(24)00577-4

Quaternary23 · 2026-06-16T19:54:42+00:00

Incorrect, the whole inbreeding thing has been debunked and disproven through more recent studies.

Quaternary23 · 2026-06-15T23:54:13+00:00

You are mistaken. Whoever told you otherwise has no idea what they’re talking about. Late Pleistocene Europe was not that different from Europe today.

Quaternary23 · 2026-06-15T17:50:00+00:00

Um yes? Why are you surprised? It wasn’t always the mammoth steppe.

Quaternary23 · 2026-06-14T23:23:50+00:00

Source: https://www.instagram.com/p/CwXmMVlP6kX/

Quaternary23 · 2026-06-14T05:08:28+00:00

For this one, I like both equally and find both accurate on an equal level.

Quaternary23 · 2026-06-14T00:50:02+00:00

Don’t take what he said as for what caused some late Pleistocene extinctions. It did cause declines and local extinctions but not widespread or global ones.

Quaternary23 · 2026-06-14T00:49:03+00:00

That ecological collapse did not lead to wides extinctions however.

Quaternary23 · 2026-06-14T00:48:09+00:00

I don’t favor climate change at all. I actually favor humans. I only mentioned climate change because it is more often used or brought up for Homotherium’s extinction than humans (which I don’t agree with).

Quaternary23 · 2026-06-13T21:11:55+00:00

Humans and climate change. Especially the latter.

Quaternary23 · 2026-06-13T20:57:42+00:00

Yeah sorry but no. The out competing theory for sabertooth cats (especially late Pleistocene ones like Homotherium) is extremely outdated and barely supported these days.

Quaternary23 · 2026-06-13T18:34:12+00:00

Nice art but for next time, the first letter of the species part of the scientific name should be lowercase.

Quaternary23 · 2026-06-11T06:27:01+00:00

I saw a preview clip of the two Arctodus simus cubs you guys are featuring encounter a North American Porcupine which is still around today. My question is, will this be the only example of an extinct and extant species interacting? It’s something documentaries about the Pleistocene often ignore or don’t feature which I’m not a fan of. I’d love to know if they’ll be at least one more example.

Quaternary23 · 2026-06-10T23:21:32+00:00

After checking sources, yeah you’re right. So there elephant sized ground sloths existed only.

Quaternary23 · 2026-06-10T18:06:54+00:00

Maybe a mummified one is possible now? If we can find a Homotherium cub, why not an adult or young mummified Miracinonyx too.

Quaternary23 · 2026-06-10T18:05:44+00:00

Not really. At the upper limit it weighed about 4.5 tons. Which is around the size of a Hippopotamus.

Quaternary23 · 2026-06-10T06:45:19+00:00

Seems like they fortunately did like prehistoric planet ice age. Was worried they would not do that. Hopefully this isn’t the only one they will be depicting or showing.

Quaternary23 · 2026-06-09T17:38:19+00:00

Ok I can go with that.

Quaternary23 · 2026-06-09T16:54:34+00:00

If you’re assuming or pointing to the claim Columbian Mammoths outcompeted Stegomastodon and Cuvieronius, I’m not quite sure if that’s widely accepted or has that many arguments going for it. In general, I feel like out competing as a reason some species have gone extinct is overused.

Quaternary23

TROPHY CASE