12. Dog (325 pounds per square inch)
10. Lion (650 psi)
He may be king of the jungle, but the lion isn't king of this list, even among felines (as you'll see). At approximately 650 pounds per square inch, the lion's bite is relatively weak compared to that of other big cats. In our nightmares, being attacked by a lion may be all about being pounced on and torn to ribbons with flying claws and rending teeth. But the way most cats take down their prey is more subtle than that. When a lion attacks a wildebeest or buffalo, it clamps its jaws down on its victims throat, crushing the trachea. Once the prey is dead from suffocation, the pride feasts. Even though a lion's bite is "weak" (although still six times that of a human), their jaws are only one weapon in their arsenal, so don't start thinking it's a smart idea to go out and poke a lion with a stick.
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9. Bear (975 psi)
Bears are only No. 9 on this list, but they win the prize for most adorable. Not that there's much cute about an angry, 800-pound grizzly, but between teddy bears, Winnie the Pooh and other pop-culture bear icons, humanity seems to have a long-standing wish to see these beasts as mere pot-bellied, sunny-dispositioned cuties that want nothing more out of life than honey and hugs. If you see one in the wild, though, don't dare try rubbing its tummy. A bear's 975-psi bite is enough to crush a bowling ball. And bear attacks aren't particularly rare, either. If you plan on hiking or camping anywhere there are bears (i.e., basically any place for hiking or camping), you'd better know ahead of time what to do in case you encounter one. A bear is liable to attack you if it perceives you as any kind of a threat to its territory, food or family. Or it may just be hungry, and you look delicious. Don't end up like these folks.
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8. Alligator Snapping Turtle (1,000 psi)
If you ever went freshwater swimming as a kid, you might have had a friend or a sibling who teased you about dangerous snapping turtles waiting to bite off your fingers and toes. If we're talking about the common snapping turtle, which are fairly docile and harmless, you probably had nothing to worry about. But if you happened upon an alligator snapping turtle, you might actually have been in danger of losing a digit or two. Though it is the smallest animal on this list, the alligator snapping turtle's bite packs enough of a punch to slice through finger bones with ease. Granted, that kind of trauma is very rare because these turtles are uncommon and not particularly aggressive, but amputated fingers are not completely unheard of. Plus, alligator snapping turtles can live to be around 100 years old, and you know how cranky the elderly can be sometimes. Just watch where you step the next time you take a dip in the creek.
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7. Tiger (1,050 psi)
Of the big cats, tigers have been the deadliest to humans, although this is due mostly to tigers living closely with us in India and other parts of Asia. But it remains true that they are among nature's finest predators. They are the largest big cat, and with a bite force of around 1,050 psi, they bite almost twice as hard as lions do. Perhaps that's why lions hunt in packs to take down their prey, while tigers are perfectly content — and efficient — flying solo. No teamwork needed, not with jaws like that. Even a trained tiger who's "just playing" can do some serious damage. For example, Roy Horn of Siegfried and Roy was the victim of the most famous tiger attack when his show tiger, Montecore, attacked him during a performance. Some experts claim that after Horn tripped accidentally, Montecore was only trying to help by using his maw to grip the entertainer by the throat and drag him off-stage. The tiger's "assistance" ended Horn's career and almost claimed his life.
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6. Hyena (1,100 psi)
Hyenas suffer from a pop-cultural reputation as cowardly scavengers. (Most have us have seen "The Lion King," right?) It's mostly undeserved. Although hyenas are indeed scavengers — but hey, so are dogs — they do hunt and kill their own food the majority of the time. With their aggression, and a biting force that rates as one of the most powerful of all mammals on Earth, hyenas have even been known to chase off lions in order to claim prey for themselves. Take that, Mufasa. And whether you're talking about fresh kills or scavenged caracasses, hynenas are ravenous and leave little behind. When feeding, they routinely shatter and consume bone using their mega-powerful jaws. Shuddering yet? If you plan on camping in hyena territory, beware. They may attack unprovoked. Just this summer, hyenas attacked a sleeping Kenyan family in the middle of the night, killing two children and injuring six other people.
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5. Gorilla (1,300 psi)
Gorillas are the largest of all our primate cousins. With huge, muscular, tree-trunk-like arms and enormous canine teeth biting down at a strength of 1,300 pounds per square inch, a 400-pound silverback (adult male gorilla) certainly cuts an imposing figure. That said, these gentle giants are little threat to people. They are herbivorous, peaceful and generally shy in the presence of humans. But silverback troop leaders will engage in combat should they meet and come into conflict in the wild, and these fights are often to the death. It's in these situations that the ferocious teeth and formidable bite of the gorilla come into play. Gorilla-on-human attacks are not entirely unheard of, either, although these usually take the form of self-defense or, in the case of a zookeeper in Buffalo, N.Y., who was bitten by a gorilla last spring, "love bites." Even though reports indicated the bites in this instance were intended to be playful, they sent the keeper to the hospital, and a SWAT team had to be called in to tranquilize the gorilla. Chomp!
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