Could Dinosaurs Have Been Warm-Blooded?

For a long time, scientists have debated whether dinosaurs were warm-blooded or cold-blooded. Turns out, they were probably somewhere in between.

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[spiney]

I'm glad the disagreement over the study was noted. We always need to question data and studies, even if its really exciting.

[SindriMjolnir]

You forgot to mention the corrolation between how many carnivorous dinosaurs there were in ratio to herbivorous dinosaurs. Most likely there were 10 carnivores to 90 herbivores which is the same ratios we see in mammals. Cold-blooded reptiles however can have the ratio of 40 carnivores to 60 herbivores because the carnivores don't have to eat as often because they're cold-blooded ;)

[TigerHawk]

What about that bog or swamp in Madagascar where they've found actual dinosaur bones with meat and tissue still connected and preserved to it? (From what I heard the clay in the area was so thick it held no oxygen, and thus no tissue degradation was possible in this area) Couldn't they do these tests with those samples for more conclusive results?

[MineKynoMine]

If we have Dinosaur Marrow, can we now find out the age old question?

What does Dinosaur taste like? (I forgot to eat lunch today)

[thatvalentian]

Michael is basically Hank with better hair. Hank is basically a clone John but WAAYY geekier. John is basically a nerd/reg hybrid with puffy puff hair...






which is also better than Hanks. Sorry, I am an older brother, I gotta side with him.

[youtubeviewer]

I love this guy’s voice
It’s like a whisper but at normal speaking volume

Very nice to casually listen too

[exelsiar]

If there is squishy bits still, does that mean potential for DNA extraction? :D

[sinfulldreamer]

Scientist 1: "You sir are mad! Dinosaurs are reptiles, they must be cold blooded!"
Scientist 2: "Now you listen and you listen good. Birds are one of the closest living relatives to dinosaurs, and I don't need to tell you that they're all warm blooded."
Scientist 1: "Do you know how difficult it is to maintain demostatis for an animal so large? They're cold blooded, I tell you!"
Scientist 2: "Lemme tell you something. It's suggested that velociraptors had feathers. Feathers! Now what does that tell you?"

[bspiessc]

Video was pretty misleading with regards to the squishy bits. There are no squishy bits inside the fossils of the bones (not bones!) anymore. Only the FOSSILIZED IMPRINTS of what once was the squishy bits. So no DNA or anything. It's all just ROCK.

[pveqnrt]

As a student of paleontology and a long-time dinosaur fan, I thoroughly enjoyed this SciShow video! Great job on this one, folks. ;-)

[invisiblejaguar]

Wow, dinosaurs were indeed among the more unique animals. I wish I could go back and see them in their prime, if only for a short time.

[TheFancyUmbreon]

If you haven't yet, do you guys think you could do a video on paradoxes? Like what some of the most popular ones are, what defines them, etc.

[LamirLakantry]

As far as I understand it, the British researchers did not find soft tissue or red blood-cells, but the broken down residue of those things, which they then treated with acid to make soft for tests.

[WatchMissaugust]

I love this channel! I was never interested in science till college and now I love learning everything there is to learn!!

[ameliaaiken]

These videos never fail to be intriguing and thought-sparking. Thank you for the awesome content!

[SpacePatrollerLaser]

One measure of "thermy" that I saw on a PBS special was the distribution of vascular opening in the bone. These openings allowed blood into the bones to get at the marrow to refresh their cell content. The fewer the openings, the more it pointed to ectothermy. Many dinossaurs had vascular opening distribtions that were too numerous for ectothermy but to sparse for endothermy. the consensus was that some dinos used their large body size to hold heat gathered from the environment which was pretty tropical over most of the Earth anyway, with some of the smaller Coelusauria being truly warm blooded and the larger dinsoaurs being "megaphysiothermic"; primarily ectothermic but with bodies large enough to hold temperature fairly stable. The larger a three-dimensional body the more it's temperature remains steady since its size is not linear, not areametric, but volumetric or xI^3

[CaptNSquared]

So we found Dinasour blood?

Prepare for real life Jurassic Park!!!

[Magmafrost]

is there anything on dromaeosaurs specifically though? Because they were completely, head-to-toe covered in feathers, and had a _very_ active lifestyle, and were also largely around in the cretaceous (yes, I know, they possibly first appeared mid-jurassic), and were likely the most bird-like dinosaur group(except for birds, which technically straight up _are_ dinosaurs) so its likely that dromaeosaurs specifically were endotherms.

[freddieellis]

I seem to remember that it was Bob Bakker who first (or at least famously) opined that dinosaurs were warm blooded. I recall that he got a stupid amount of flak for saying too!

[TheSvj]

Let's make a Jurassic World but just better and more safe!