Those photos are so cherry picked that even a layman can point it out. Humans have sharp teeth in the front made to cut through flesh/plants with flat teeth in the back for grinding said meal into an easily swallowable mush. If you actually think for a few moments, then you'll realize that horses primarily feed on tough plant matter which is pretty rare e.g. grass. They need slightly sharper teeth to cut through the toughness, but that isn't even the point here. Horse teeth are pretty flat.
The OP just decided to take a photo where you can't see the flat top and lie about saying that it is common.
Humans aren't even that good at digesting plant matter ffs. We evolved to eat meat because eating plants isn't enough to fuel our needs. We don't have the time to spend hours doing nothing but eating. We instead eat very nutritious meat with high amounts of calories instead.
First, the top profile is also important. The set on the right would have flattened tops, little bit like our molars. The carnivores’ and omnivores’ teeth are pointed or otherwise designed for cutting through meat rather than mashing vegitation.
Second, we know we are omnivores for a very simple reason: we can and do eat meat. The digestive tract needed to eat meat is completely different than that needed to eat vegitation, and if we had not evolved to eat meat we would not be able to do so.
animals like cows and horses have a more side-to-side method of chewing to help grind up plant matter. We don't. Our main jaw movements when we eat are up and down, not side to side... and guess who else has jaw movements like these? Carnivores! Humans are omnivores so we have a blanace between ripping meat and chewing vegetable matter.
And if you say "Well what about chimps, they have long canines and they're omnivores, and we don't so we must be vegetarians", you'd still be wrong because male chimps use their long canines to intimidate other males. Just thought I'd add that in there.
Also, herbivorous species do not have a brain capacity anywhere close to a human's.
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Edited 5 years ago
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· 5 years ago
The human teeth picked out must be purged from the gene pool
Meat is completely digested by enzymes produced by our own bodies in the small intestine. Plants must be converted and broken down by the bacteria in the lower intestine before we can absorb the nutrients and even then most of the plant material is indigestible and excreted as bulk or fiber.
Meat is 100% compatible with our biology whereas plants are not. The shape of our teeth is irrelevant.
Ex-paleontology student to the rescue!
These studies involve a LOT of fidgeting around with dead stuff and learning about bones and teeth so:
Vegan animals typically have selenodont teeth : flat, with moon-shaped structure on top. If you happen to look at a cow's skull and jaw, it's actually kinda pretty. But we don't have that. Mouse, hamsters, squirrels, have a flat surface on their teeth, it's not horizontal, the one on the upper jaw joins the one on the lower jaw, and they ALWAYS have to chew stuff so that it doesn't grow too much. The teeth on the cheek part of horses' jaw are also like this - they're called hypsodonts. But we're not like this either.
Typical carnivore teeth are conic and pointy, like our canines, or secodonts (like a cat's, it makes sharp little crests), like our molars. And, guess what? Our teeth stop growing as adults, which is a trait of brachyodonts : carnivores and omnivores.
...And to think I was convinced this piece of knowledge would never come in handy.
I mean we have canines for a reason. They just cherry picked a human with particularly flat canines.
Also rats are omnivores, rabbits are not, bith have very similar visible front teeth. Birds are omnivorous with no teeth, and fish's teeth vary as much as the fish themselves
The OP just decided to take a photo where you can't see the flat top and lie about saying that it is common.
Humans aren't even that good at digesting plant matter ffs. We evolved to eat meat because eating plants isn't enough to fuel our needs. We don't have the time to spend hours doing nothing but eating. We instead eat very nutritious meat with high amounts of calories instead.
Tell me how we are supposed to eat plants?
And if you say "Well what about chimps, they have long canines and they're omnivores, and we don't so we must be vegetarians", you'd still be wrong because male chimps use their long canines to intimidate other males. Just thought I'd add that in there.
Also, herbivorous species do not have a brain capacity anywhere close to a human's.
nuthin personal
Meat is 100% compatible with our biology whereas plants are not. The shape of our teeth is irrelevant.
These studies involve a LOT of fidgeting around with dead stuff and learning about bones and teeth so:
Vegan animals typically have selenodont teeth : flat, with moon-shaped structure on top. If you happen to look at a cow's skull and jaw, it's actually kinda pretty. But we don't have that. Mouse, hamsters, squirrels, have a flat surface on their teeth, it's not horizontal, the one on the upper jaw joins the one on the lower jaw, and they ALWAYS have to chew stuff so that it doesn't grow too much. The teeth on the cheek part of horses' jaw are also like this - they're called hypsodonts. But we're not like this either.
Typical carnivore teeth are conic and pointy, like our canines, or secodonts (like a cat's, it makes sharp little crests), like our molars. And, guess what? Our teeth stop growing as adults, which is a trait of brachyodonts : carnivores and omnivores.
...And to think I was convinced this piece of knowledge would never come in handy.
Also rats are omnivores, rabbits are not, bith have very similar visible front teeth. Birds are omnivorous with no teeth, and fish's teeth vary as much as the fish themselves