this post was submitted on 25 Oct 2024
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Science Memes

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[–] [email protected] 92 points 1 month ago (1 children)

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

[–] [email protected] 28 points 1 month ago

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

[–] [email protected] 46 points 1 month 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] 45 points 1 month ago* (last edited 1 month 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] 31 points 1 month ago (2 children)

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

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

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

[–] [email protected] 3 points 1 month ago
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[–] [email protected] 16 points 1 month 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 1 month 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] 17 points 1 month 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 1 month 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.

[–] [email protected] 4 points 1 month ago* (last edited 1 month ago)

There are lots of videos about croc bite force. With scales attached to their jaws and stuff. Shouldnt be hard to find.

This younger one was measured at the base with 820 pounds https://www.youtube.com/watch?v=cG7ruzhqB9Y&t=158

[–] [email protected] 42 points 1 month ago* (last edited 1 month 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] 21 points 1 month ago (1 children)

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

[–] [email protected] 6 points 1 month 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] 6 points 1 month ago (3 children)

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

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[–] [email protected] 8 points 1 month 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 1 month 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

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[–] [email protected] 7 points 1 month 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] 4 points 1 month 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] 35 points 1 month ago (2 children)

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

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

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

[–] [email protected] 9 points 1 month ago* (last edited 1 month 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] 20 points 1 month 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 1 month 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 1 month ago

Highly depends on the dog.

[–] [email protected] 16 points 1 month 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 1 month ago* (last edited 1 month ago)

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

Bite Force and Occlusal Stress Production in Hominin Evolution

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

Newton had some weak ass jaws.

[–] [email protected] 4 points 1 month ago

Never skip jaw day.

[–] [email protected] 7 points 1 month 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 1 month 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.

[–] [email protected] 4 points 1 month ago

For the extant creatures you give them something they want to bite on and stick a measurement thing inside of that.

For extinct creatures see other comment. You compare anatomy and do math.

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[–] [email protected] 7 points 1 month ago (2 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.

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[–] [email protected] 6 points 1 month ago

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

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

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

[–] [email protected] 5 points 1 month 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 1 month 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.

[–] [email protected] 3 points 1 month ago* (last edited 1 month ago)

Not all dogs are the same, of course. Some dog breeds can bite harder than wolves. We selectively bred them for chomp strength.

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

Lion is still trying SO hard!

[–] [email protected] 3 points 1 month ago

alternatively it looks like someone just bit him haha

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