revealed that tyrannosaurs had unique ligaments that supercharged their feet, allowing them to move swiftly across vast distances.

"People have long been attracted to the awesome power and ridiculously small arms of Tyrannosaurus rex and its kin, but the legs—and especially the feet—of the tyrant dinosaurs were also highly specialized," said Holtz, a principal lecturer in UMD's Department of Geology. "This new study helps to show that even on a microscopic level, tyrannosaurs were adapted for both long-distance running and rapid acceleration."

DD'eDeN aka note/nickname/alas_my_loves wrote:

> revealed that tyrannosaurs had unique ligaments that supercharged their feet, allowing them
> to move swiftly across vast distances.

Absolutely NOBODY believed that they did this.

A T-Rex had tiny little stubs for arms. Looking at 65 million years before anyone
was building any smooth, level surfaces, running across long distances presented
a high likelihood of tripping, and tripping would slam it's skull into the ground at
great force.

https://physicstoday.scitation.org/doi/pdf/10.1063/1.1480769

Search on the term "Tripped."

They also get into some positively boring talk about muscle mass...

> tyrannosaurs were adapted for both long-distance running and rapid acceleration."

No. Nobody believes this.

It may well have been an ambush-hunter, moving very quickly over a very short
distance, and there's an excellent argument for scavenging, but the thought of
a t-rex engaging in long distance "persistence" hunting is patently ridiculous.

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https://jtem.tumblr.com/tagged/Darwinism

On Sunday, December 4, 2022 at 4:11:58 AM UTC-5, JTEM is so reasonable wrote:
> DD'eDeN aka note/nickname/alas_my_loves wrote:
>
> > revealed that tyrannosaurs had unique ligaments that supercharged their feet, allowing them
> > to move swiftly across vast distances.
Absolutely NOBODY believed that they did this.

A T-Rex had tiny little stubs for arms.

Homo sapiens has balancing long arms and no tail.
Tyranosaurs had short arms and big heavy balancing tail.

They had high efficiency aerobic breathing and were probably partly warm blooded.

They may have been endurance runners, though not at the same level as Homo.

DD'eDeN aka note/nickname/alas_my_loves wrote:

> A T-Rex had tiny little stubs for arms.
> Homo sapiens has balancing long arms and no tail.
> Tyranosaurs had short arms and big heavy balancing tail.

Superficially, a T-Rex doesn't look dissimilar to over 100 million
years worth of other dinosaurs. Point the Google towards
"Allosaurus." It was as likely "cold blooded" as T-Rex as "warm
blooded." And of course they are clearly different species,
getting into the details here, but superficially they are very, Very
similar.

T-Rex didn't spring from the air. What we see is the result of
countless millions of years of selective pressures, AND the
lack there of.

If there isn't pressure to change, transform, then it's not going
to, absent any indirect pressures... like the claim that floppy
ears on a dog aren't so much selected for, but "Came along
for the ride" as they evolved away from aggression.

So, yes, the tiny arms may not have been selected for. Maybe
they were. Maybe they grabbed hold their prey and spun like
a crocodile, the "Death Roll."

https://youtu.be/1sqw49cQWOo

Big arms could have gotten in the way, invited injury. Or, they
could have just been unnecessary so if any "Smaller arms"
mutation cropped up there was nothing stopping it from taking
root...

The point is, we are NOT talking about "Intelligent Design." There
is no conscious choice here. The basic dinosaur model is not
going to change, absent some pressure -- environmental or
genetic -- to do so. The body type remaining so similar over the
span of the dinosaur reign speaks to the adaptability of that
body type, not necessarily a continuation of the lifestyle and
environment.

Man, I'm bored...

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https://jtem.tumblr.com/post/703468006592905216