Prehistoric Planet 2 - How Did Dinosaurs Get So Big? | Apple TV+

[@pharoahcaraboo9610]

the dinosaurs' secret was being bird relatives. hollow bones, efficient metabolism... and sauropods were very efficient eaters on top of that. rake-like mouths, with their long necks, meant they could stand in one place and browse foliage at a wide radius without moving.

[@rampage75_25]

Dreadnoughtus? Hm... "I leave only rubble" "None shall block our path"

[@ivongrey9047]

And the Dreadnoughtus Fears Nothing at all!

[@UnwantedGhost1-anz25]

I hope they do Palaeoloxodons next. The biggest elephants ever to have existed. Probably more than even Paraceratheriums.

[@The_Story_Of_Us]

Palaeoloxodon namadicus, the specimen you’re referring to that supposedly got a shoulder height of 5.2 meters was based on a vague description of a fragmentary bone in a 150 year old paper from a fossil no one has located. It’s not scientific to suggest that animal definitely existed, even the author who made the estimate said to take it with a huge pinch of salt. The largest elephantid we know of with reasonable certainty is a large individual Steppe Mammoth at 4.5 meters at the shoulder, though it could have been outweighed by the shorter but more robust Mammut borsoni, a mastodon. But scientifically, I think the consensus is that Paraceratherium is the largest land mammal known to have lived, which is fitting because it’s the closest to a sauropod that land mammals got, with their pillar like legs, huge bodies and long browsing necks.

[@EmeraldChaos270]

These People Are Legends

[@AxolotlFNOffical]

the fact David Attenborough is Richard Attenborough brother and Richard atten. played John Hammond in Jurassic park

[@Frenchylikeshikes]

I have always had a hard time understanding how reptiles went to be so gigantic, to be so tiny (for most of them) nowadays.

[@eybaza6018]

Dinosaur anatomy was supremely well adapted for gigantism. Pneumatized bones with air spaces and more efficient respiratory systems.

[@trvth1s]

The reptiles of today with sprawling legs existed back then and they were small back then as well. You can't compare iguanas to dinosaurs

[@trvth1s]

@mp2764 that's not true. Where did you read this?

[@juanyusee8197]

Modern reptiles lacked the needed adaptations that allowed sauropods to grow so big + Extant megafauna niche has been occupied by mammals first after the K-Pg.

[@rabidL3M0NS]

Certified “if we evolved from monkeys why are there still monkeys” moment.

[@PikachuIno]

I mean a scale toy of this Alamosaurus in this episode

[@PikachuIno]

I wish a Alamosaurus as toy

[@absyahwa7698]

try find haolonggood or PNSO toy

[@hosni4064]

PNSO has a fantastic looking Alamosaurus model, it costs around 70 USD, but for how beautiful it looks and how big it is, I'd say it's worth it.

[@mrwest5552]

answer : steaks medium rare, cheese burgers with bacon, lamb chops and cheesecake.

[@Crabonoe]

Epic

[@DanielMartin-lz1ys]

I'm not suggesting that gravity was lower in the past, but if you look at animals similar in size or larger than elephants, they seem to be more lightly built. For example, the Paraceratherium, which was larger than an elephant, is not as robust. Similarly, duck-billed dinosaurs of comparable size or bigger also appear to be more lightly built than elephants.

[@denistyrant]

It heavily depends on which animal you use. Proboscideans (Except for a few exceptions), don’t have very well developed limb musculature. Some animals like Triceratops were actually far more heavily built than Proboscideans.

[@ΠαναγιωτηςΑγγελ]

The weird thing is that most dinosaurs species are medium to small size animals while an infamous minority of them is big animals

[@DominiqueEugene-m7k]

We’ll never know that for sure. Still plenty of undiscovered fossils that’ll possibly never get found unfortunately.

[@gentlemantwerp]

Well my favourite dino is the prehistoric planet accurate dreadnaughtus :)

[@dhangrodriguez]

Largest gigantic sauropod

[@hanamichi9044]

The answer is food.

[@elnovillomapuchedehomerus2412]

The answer is always food, it also explains why theropods had small arms as a way to not accidentally hurt each other during a food frenzy and got infections.

[@GalvyTheTom]

@@elnovillomapuchedehomerus2412That’s not actually why we think they had small arms. We think their arms grew relatively small to allow them to grow their heads much larger and still keep their bodies balanced - balance would have been incredibly important for large predators like theropods, and prioritizing their heads meant they could focus on evolving those into efficient weapons and not overweigh their front halves through shrinking their arms.

[@kaitokid_1412]

Maybe there something in prehistoric phase of the earth environment which would help them...

[@trvth1s]

They were just big because there was a lot of food and they were good at being big. Ornithischians were very similar to mammals in bone structure and food ingestion, but egg laying allowed them to survive extinction better than mammals even when big, so you had a lot of large ornithischians. Sauropods, unlike mammals and ornithischians, did not have to chew their greens allowing them to ingest more greens, thus they got huge. Theropods had so much giant sauropods and large ornithischians to eat they could get huge for predators.

[@SaffronComet560]

@@trvth1s what do you mean good at being big? That is not a very reasonable answer. it might have also been because the atmosphere wasn't formed as much as today's atmosphere.

[@trvth1s]

@@SaffronComet560 what does a firmed atmosphere even mean? That doesn't make sense because the atmosphere is always changing. Dinosaurs also had airsacs because the atmosphere was low in oxygen back then

[@jamesburke6078]

I can give you a 100 points on why I think rex attacked from the bank or water... you might be able to give me 2 for why it didn't! Whole idea is absolutely absurd 😮

[@fransiscayayuk3526]

🦕

[@jamesburke6078]

I want to make a point then I will leave you alone,I live in the Appalachian mountains, nothing is moving in the mountains without fear of breaking a leg... not deer... I've seen them break their legs trying to run in the mountains...I can't move through the foliage with any grace... what makes anyone think a 5 ton predator is doing it? How dumb can anyone be?

[@stickmanblubbles4489]

Deer, if anything like horses, have basically min maxed their bodies for running. Its unsurprising that such fragile body frames are prone to breaking bones, and it doesn't help that they're not very smart. Most people these days can't move through the undergrowth very fast because we're sheltered, but people from hunter-gatherer tribes can do so extremely quickly.

[@EmeraldChaos270]

🦖🦕

[@Denasor1holande]

ديناصور اه اللغة بريطانيه الإنكليزي بريطاني بس لا حدا يخدعكم

[@jirou6228]

Maybe in the past there is more Oxygen for them to growth

[@jonathankennedy1963]

Oxygen levels doesn't actually do that, not in the way you think. Sure, It was the case for insects, but it's because they have a weird way of respiration. Their size is limited to the amount of oxygen they can get. Dinosaurs were a different story. At the time, the oxygen was lower than today's. The reason why they were so big is mostly 2 reasons: respiration and reproduction. Dinosaurs had the most efficient lung system in all animals, the avian respiratory system. They have air sacs in their bones, allowing for more sustained energy, and at the same time, it allowed them to be relatively lightweight for their size, enabling them to get really big. Theropods, Pterosaurs, and Sauropds have this respiratory system as well as birds. Reproduction in dinosaurs were fast as they can have a large cluster at once, allowing for more variety and increased survival of offspring.

[@dibershai6009]

There wasn't more oxygen in the Mesozoic period. One of the reasons that sauropods could grow so big is due to their birdlike lungs which allowed them to breathe in more oxygen.

[@trvth1s]

@@jonathankennedy1963 Hollow bones may have also been a factor, hollow bones are more structurally stronger than bones full of marrow. Another very important factor is feeding method. Sauropoda, unlike ornithischians, elephants and hornless rhinos, do not need to chew their greens allowing for more caloric intake.

[@jonathankennedy1963]

@@trvth1s I did mention the bones, yeah. And yes, I forgot to mention the efficient digestion of sauropods.

[@juanyusee8197]

​@@jonathankennedy1963Worth pointing out that oxygen levels probably isn't even the case for gigantism in arthropods, as there are times that land/flying arthropods were around without high oxygen levels (the largest _Arthropleura_ specimen was found in rocks before the oxygen levels in the Carboniferous skyrocketed, and it as well giant griffinflies were initially still around during the early Permian).

[@dhangrodriguez]

You can't tell the female and male?

[@SurviveThriveNetwork]

How we survive with Dinosaurs?

[@electrowoof6852]

We didn't

[@DominiqueEugene-m7k]

Our common ancestor were shrew sized-honey badger sized, nocturnal mammals. Without that mass extinction event, we would’ve never evolved further as mammalians.

[@jamesburke6078]

Before you put me off as a nay sayer remember that the same type of educated people are saying a man can be a woman 😂...and even dumber stuff than that...

[@GaiusIntrepidus]

You are a naysayer