this post was submitted on 25 Oct 2024
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Science Memes

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[–] [email protected] 89 points 4 days ago (1 children)

So Isaac Newton had only 1/700th the bite force of a normal human? Pathetic.

[–] [email protected] 27 points 4 days ago

Probably due to all the mercury and shit he was playing with as an alchemist

[–] [email protected] 7 points 3 days ago (1 children)

Bite pressure would be a more interesting comparison IMO. Of course a Trex is gonna have a massive bite force because it's dominated by size.

[–] [email protected] 1 points 2 days ago (1 children)

It's also got some trick jaws, it's not 100% from size alone. Like dunkleosteus, which had a novel jaw that amplified the force.

[–] [email protected] 2 points 1 day ago

Fair enough, from my very limited research (Chicago museum has an exhibit about this exact thing), some animals use a 4-bar linkage to maximize force. I think Trex was among them.

[–] [email protected] 40 points 4 days ago* (last edited 4 days ago) (6 children)

I got a bone to pick with this kind of diagram. Everyone likes to talk about how much better other animals are at things than us, but if you look at animals holistically, humans are really fuckin good at everything. Like yeah there's a bunch of animals that are faster than us, a bunch of animals that bites stronger than us, a bunch of animals that are more muscular than us, but we're consistently in like the top 10% overall

Finna make a version of this meme where it's mice and iguanas

[–] [email protected] 20 points 4 days ago (1 children)

We also have better full-light vision than a lot of animals, even the ones with good dark vision.

[–] [email protected] 5 points 3 days ago (3 children)

And we have better night vision than most the animals that have better day-vision than us. Humans are like the Leatherman of animals. Universally capable of doing most things but not as good as something specialized for that task. Plus of course capable of coming up with ways to cheat

[–] [email protected] 1 points 2 days ago

We’re also the best marathon runners, as a species.

[–] [email protected] 6 points 3 days ago (3 children)

jack of all trades, master of none, but oftentimes better than a master of one

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[–] [email protected] 7 points 3 days ago

All this picture says is basically "the bigger the jaw, the more biting force". And then it compares animals with bigger jaws than humans

[–] [email protected] 8 points 3 days ago (1 children)

Also like, we aren't cursed to a life of suffering and early death if something takes a bite out of our leg, we can patch it up and get assistance from those around us to still live a good life.

[–] [email protected] 3 points 3 days ago (1 children)

Hell yeah, that's what sets humans and non-humans apart: if part of our pack can't survive on their own, we take on the burden of surviving for them. No other animal can survive a broken femur like humans can, and it's not because we have some incredible healing factor. Whenever I'm on the verge of feeling despair, I think about that 15,000 year old broken femur

[–] [email protected] 1 points 2 days ago

We CAN do that. Whether we choose to as a society, is far more up in the air, unfortunately.

[–] [email protected] 4 points 3 days ago

Don’t forget about the human ability to literally chase an animal until it collapses with exhaustion. Humans are literally the monster from It Follows.

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[–] [email protected] 46 points 4 days ago (4 children)

Every time I picture an alligator biting me I'm like I bet I could wiggle out or like somehow overcome it, because their jaws look so long and flat - like how much strength could they have? Certainly not more than a lion.

Well.

[–] [email protected] 44 points 4 days ago* (last edited 4 days ago) (1 children)

The closing force is significantly higher than its opening force IIRC. If you can close its mouth without getting bitten it's screwed.

[–] [email protected] 29 points 4 days ago (2 children)

Didn't like everyone watch Steve Irwin do this to massive crocs like all the time.

[–] [email protected] 11 points 4 days ago (2 children)

Yeah, but time marches on and everything. Young people won't know him. Someone said they didn't know who a guy in a picture was the other week. It was Tony Bourdain and I felt old.

[–] [email protected] 12 points 4 days ago (1 children)

A coworker the other day didn't know there was an animated grinch movie before the Jim Carey one. ಠ╭╮ಠ

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[–] [email protected] 2 points 3 days ago
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[–] [email protected] 16 points 3 days ago

Just remember these guys can grip an animal the size of a horse with their jaws, overpower it, drag it to the water and rip it apart.

[–] [email protected] 10 points 4 days ago (4 children)

Salt water Crocs are not tiny. Some alligators are on the smallish side comparatively, but there are big gators out there too.

[–] [email protected] 16 points 4 days ago

Crocodiles are also one of those rare animals that don't "age" in the traditional sense. Once they reach adulthood, they continue to get larger and larger until they eventually starve or their organs collapse under their own body weight. They don't lose muscle mass or bone density or any of the usual issues we attribute to getting older.

Imagine having the build of a 25 year old at 100 and being 7+ft tall. That's how crocodiles age.

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[–] [email protected] 7 points 4 days ago (1 children)

I bet this is peak force is measured at the base of the jaw, meaning the teeth at the tip would exert significantly lower force. So it might be possible to escape a small alligator, I'm not sure.

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[–] [email protected] 35 points 4 days ago (2 children)

I can eat way more than 700 fig Newtons. This is bullshit.

[–] [email protected] 13 points 4 days ago (1 children)

Yeah but do you have the bite force to bite through all 700 at once?

[–] [email protected] 9 points 4 days ago* (last edited 4 days ago)

I would think... They're pretty soft.

Perhaps not after my jaw dislocates to fit them all in my mouth, though.

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[–] [email protected] 6 points 3 days ago

so to bite harder i need crocs and seasalt, ok ok ok.

[–] [email protected] 13 points 3 days ago* (last edited 3 days ago)

Our ancestors had more bite force. It wasn't needed anymore.

Bite Force and Occlusal Stress Production in Hominin Evolution

[–] [email protected] 16 points 3 days ago

Highly depends on the dog.

[–] [email protected] 20 points 4 days ago (1 children)

Given:

Bite Force of T. rex: 45,000 Newtons

Jaw Closing Distance: Approximately 0.3 meters

Energy=Force×Distance=45,000N×0.3m=13,500Joules

Say we have a typical 10w led lightbulb, how much could it power it for?

Time= Power/Energy=13,500J / 10W=1,350 seconds, or approximately 22 and a half minutes with a single T-Rex chomp, assuming 100% conversion efficiency

[–] [email protected] 16 points 4 days ago

Fun fact, the (rough) conversion efficiency of calories to mechanical joules in the human body (separate from the mechanical to electrical you're referring to) is about 25%


but this is about the same factor as going from calories to joules! So, for a human to put out 13.5 kJ of energy would require about 13.5 food calories (kilocalories).

[–] [email protected] 16 points 4 days ago

To break the largest human bone, the thigh bone, an estimated force of 4,000 newtons is needed. However, the amount of force required to break a bone depends on how the force is applied.

-Random internet source

[–] [email protected] 13 points 4 days ago* (last edited 4 days ago) (1 children)

Newton had some weak ass jaws.

[–] [email protected] 4 points 4 days ago

Never skip jaw day.

[–] [email protected] 5 points 3 days ago (1 children)

Lion is still trying SO hard!

[–] [email protected] 3 points 3 days ago

alternatively it looks like someone just bit him haha

[–] [email protected] 7 points 4 days ago (3 children)

How is this calculated? Presumably you could directly measure all but the T-Rex and pliosaur, but how are those bits forces calculated?

[–] [email protected] 18 points 4 days ago

I'm no BiteForceologist but I was assume they compare muscle size, muscle attachment points, and mechanical advantage of extant creatures and then apply that data to fossils. So not 100% accurate, but not just guessing randomly.

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[–] [email protected] 5 points 4 days ago (4 children)

There's no way a human's bite is only 30% less than a dog's. Our jaws have shitty leverage to chomp down hard.

[–] [email protected] 8 points 4 days ago

We are omnivores and do a lot of chewing. Dogs don't really chew, just rip.

Some great apes that have more raw plants in their diet even have a bony ridge on their skull that the jaw muscles attach to.

Our jaws actually have great leverage, our molars are very close to where the jaw muscle attaches.

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[–] [email protected] 6 points 4 days ago (1 children)

Man, we gotta pump those numbers up. Get our bite force on the next level.

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