1. 106-118
   2-16
2. 74-80
   44-48

Alligators have about 74-80 teeth in their mouths at any one time. You can't really be more accurate than that, because they're constantly losing and wearing teeth down. Lost teeth will be replaced, and an alligator will go through 2000-3000 teeth in their lifetime.

1. 5
   9
2. 15
   17

There are 15 recognized species of crocodile in the world, some of which are critically endangered. They can be found throughout Africa, Asia, Australia, Central and South America as well as parts of North America.

1. 7 million
   16 million
2. 23 million
   37 million

Alligators appeared about 37 million years ago in what was known as the Oligocene epoch. Many mammals began to dominate the landscape during this time period as well, with creatures like deer, rhinos and camels becoming more prominent.

1. Freshwater Crocodile
   American Crocodile
2. Nile Crocodile
   Saltwater Crocodile

Lolong was a saltwater crocodile that died in 2013. He died in captivity of cardiac arrest and pneumonia, but when he was measured afterward, he was found to weigh a staggering 2,370 pounds. It was estimated he was about 50 years old, and it took 100 people to capture him.

1. Building dams with logs
   Using sticks to impale fish
2. Using rocks to crush shellfish
   Using sticks to hunt birds

American alligators are known to hunt birds with the aid of sticks. The alligators will balance branches on their heads as they sit still, tricking birds into thinking it's a place they can nest. When they land, the alligator snaps them up.

1. 1,300 psi
   2,000 psi
2. 3,700 psi
   4,200 psi

Saltwater crocodiles have been measured to have a bite force of a staggering 3,700 psi. A lion's bite only measures around 1,000 psi, and when it comes to what a human can do, you're looking at under 200 psi for the most part.

1. Corn
   Grapes
2. Chicken
   All of the above

Surprisingly, crocodiles and alligators have both been observed eating a fairly wide variety of fruits and vegetables in addition to their predictable and expected diet of meat. They've been known to eat berries, citrus fruit, pears and apples.

1. It will be born male
   It will be born female
2. It will be destroyed
   It turns black

At temperatures above 93F or 34C, an alligator egg will be born as a male. When the temperature stays below 86F or 30C, it will be born female. If it stays in the range in between those two temperatures, it could go either way.

1. Their brain
   Their stomach
2. Their tail
   Their liver

Normally, blood goes through the lungs to get oxygenated, but these animals can redirect blood to the stomach. This CO2-rich blood can help an alligator digest a large meal much faster than normal.

1. 90-95
   100-110
2. 120-140
   155-160

The late Mr. Freshie had been shot twice back in the '70s when Steve Irwin and his father rescued him. Locals told the pair that the croc had a reputation in the area for over 100 years at that point. It's believed he was 120 to 140 when he passed away.

1. 24 miles per hour
   18 miles per hour
2. 11 miles per hour
   7 miles per hour

According to the government of Australia, a saltwater croc can attain a burst of speed in the water up to 18 miles per hour. Doesn't sound super fast until you consider that even a fast human in the water can go about 6 miles per hour.

1. To protect from salt water
   To help them absorb oxygen
2. To see better in low-light
   To allow them to magnify their vision

Behind their retinas, crocodiles have a layer of guanine crystals that reflect light back through the retina. Even in low-light conditions, this allows crocodiles to see things like prey much more clearly.

1. 30 minutes
   One hour
2. One hour and 30 minutes
   Two hours

Though it's not normal for an alligator to do so all the time, they can spend upwards of two hours submerges underwater. An alligator is capable of slowing its heart rate to a mere two to three beats per minute to pull this off. Normally, however, they won't stay submerged for much more than 15 minutes.

1. 7 or 8 miles per hour
   15 to 18 miles per hour
2. 25 to 30 miles per hour
   Almost 40 miles per hour

This one can be tricky, but, for the most part, a crocodile isn't going much faster than 8 miles per hour, and even then, it won't be for long. In a short, surprise burst of only a few yards, a saltwater croc could reach speeds of nearly 30 miles per hour at a lunge, but running is not a crocodile's strong suit. Most humans can outrun a crocodile. They don't chase prey; they ambush it.

1. Cannibalism
   Heat Stroke
2. Burmese Pythons
   Speed Boats

According to research done at Orange Lake in Florida, about 6% to 7% of juvenile alligators will be lost every year to cannibalism as the older and established population will eat the young before they reach maturity.

1. 4 or 5 weeks
   2 or 3 months
2. 8 or 9 months
   Over a year

A crocodile can survive for over a year without eating a meal, and some sources will say even longer, though that's much harder to confirm. Because they are ectotherms, they absorb the heat they'd need to sustain themselves during a period without food from the sun. They wouldn't like it, but they could do it.

1. Bones
   Horns
2. Hooves
   All of the above

Crocodiles have remarkably efficient stomachs, from which pretty much nothing escapes. Their highly acidic guts can break down bone, shell, hooves, horns and just about whatever else gets in there over a long enough period of time.

1. They remember prey that escaped them
   They hunt in organized groups
2. They hunt best in the cold
   They mark territory with plentiful prey

Alligators and crocodiles have been repeatedly observed using complex social organization during hunts. Basically, they use teamwork to hunt more efficiently. Large alligators have been observed scaring prey towards smaller ones hiding in wait, and crocodiles work in teams to trap schools of fish in circles, then take turns feeding.

1. They make sounds like human babies
   They travel through rabbit tunnels
2. They climb trees
   They can regurgitate their own stomachs

Juvenile crocodiles, and also sometimes mature ones (but not nearly as often), have been observed climbing trees. Usually, they stay one or two meters off the ground, but some have been observed as high as 10 meters (or about 30 feet) in the air.

1. It's lighter than water
   It's antibiotic
2. It's flammable
   It glows

Alligator blood has some remarkable antibiotic and antiviral properties that are still being studied. Samples of heir blood have been shown to be able to fight off dozens of different bacterias, many of which are resistant to normal antibiotics. It can also do heavy damage to HIV.

1. 25-30 feet
   35-40 feet
2. 50-60 feet
   65-75 feet

Deinosuchus fossils have been discovered in the 35 to 40-foot range. The giant creatures lived between 72 and 83 million years ago and, aside from their dramatic size, appeared to be very similar to modern-day crocodiles in appearance.

1. 30%
   20%
2. 10%
   1%

Crocodile infant mortality is no joke, and very few hatchlings make it to maturity. It's estimated that only one percent of every 1,000 eggs will even make it to five years old. Of that number, only about half make it to see six years old.

1. Laughing Dove
   African Openbill
2. Marabou Stork
   Egyptian Plover

The Egyptian Plover has been believed to have a symbiotic relationship with crocodiles since Ancient Greece. Word is the bird cleans out scraps of food from between the croc's teeth. Google it and you'll find tons of links. Know what you won't find? A photo. No one has ever actually seen this happen before.

1. Unrelated animals did it.
   Parents carry babies in their mouths.
2. Eggs leave a residue in nests that looks like blood.
   It's just an urban legend.

Crocodile and alligator babies hatch underground where the mother has buried the eggs, and then make noises the parents can hear. The parent digs up the babies and, using their mouth, will carry them to the water. This is why people believed they ate their young.

1. 6 million years ago
   30 million years ago
2. 65 million years ago
   120 million years ago

Even though crocodiles and alligators look a lot alike, they're actually pretty distantly related. Their last common ancestor was 65 million years in the past. That's about the time primates first evolved, so it's like comparing humans to monkeys in a way.

1. Speak
   Play dead
2. Come to the sound of a clicker
   Fetch sticks

Clicker training has been used effectively with dogs and sometimes even cats. Captive crocodiles have also learned clicker training. A trainer makes a clicking sound with a small, hand-held device and the crocodile will come to the sound to get fed.

1. To train babies to hunt
   To soften it
2. To attract scavengers
   To confuse other crocodiles

One theory about why crocodiles hide kills under the water is not because they want to eat it themselves, but because they want to attract scavengers like fish, turtles, crabs and other things which would then be fresh kills for the crocodile to eat.

1. 1
   2
2. 3
   5

Crocodiles are known to use three different kinds of locomotion on land. The first is called a belly crawl, which is just what it sounds like, and it's how they move over smooth surfaces like mud. The second is called the high walk in which they push up with all four legs and walk like any other animal. Finally, they can gallop, which is a weird, hopping run, kind of like a rabbit.

1. They only need sleep once a week or so
   They can't sleep in the dark
2. They only sleep during cold weather
   They keep half their brain active and awake during sleep

It's been said that crocodiles sleep with one eye open, and that's actually true. They can keep one half of their brain active and awake while the other half shuts down for sleep, meaning they can always be ready to go in a pinch.

1. 2
   4
2. 5
   8

Though there are numerous species of crocodile in the world, there are actually only two alligators out there — the American alligator and the Chinese alligator. The Chinese alligator is not indigenous to anywhere else in the world.

1. To disorient prey
   To dismember prey
2. To warn off other crocodiles or alligators
   To drown prey

The terrifyingly named death roll is something nearly all crocodiles and alligators will do with their prey. The purpose of the death roll isn't necessarily to kill the prey, it's specifically to dismember it. The teeth of these animals are not fit for chewing, just tearing, so they need smaller pieces to eat.

1. The Yangtze River
   The Mekong River
2. The South China Sea
   Poyang Lake

Chinese alligators are only found in the Yangtze River valley and nearby areas, and even then, it's incredibly rare to spot one. Official numbers are unknown, but there are likely just a few dozen left in the wild. Many more are in captivity.

1. Rubber bands
   Tape
2. Your bare hands
   All of the above

The strength of a crocodile's jaws only works one way and that's when they close. The muscles to open their mouths are relatively weak, which is why when you see people handling them, they can use their bare hands to hold their mouths shut.

1. Alligator
   Crocodile
2. It's the same
   Depends on the animal

The upper jaw of an alligator is wider than the lower jaw, so with a closed mouth, all the teeth are hidden. A crocodile, on the other hand, will display most of its teeth even with a closed mouth, which is one fairly easy way to tell them apart.