31 Eyebrow-Arching Animal Behaviors We Wish We Could Erase from Our Minds
Some animals are terrifyingly smart
![31 Eyebrow-Arching Animal Behaviors We Wish We Could Erase from Our Minds](https://s3.crackedcdn.com/phpimages/imageset/0/5/2/800052_320x180.jpg)
Have you ever seen a normal-looking animal and thought, “Oh, that’s cute,” and then, upon further inspection, realized that it’s actually kinda frightening? No? Well, you’re in for a treat because, because we’re going to share with you some of the most normal-looking animals out there that are really pretty creepy.
![Jellyfish can regress to infancy. CRACKED.COM How sweet would it be to just shrink out of society and drop some goo's and ga's in your old crib? Immortal jellyfish do just that: once they've had kids of their own, they shrink and sink back to the form and location of their infancy, and start it all over again.](https://s3.crackedcdn.com/phpimages/imageset/0/4/3/800043.jpg)
![Pigeons can be better multitaskers than humans. Scientists think it's because of their brains' neuronal density. They have six times more nerve cells per cubic millimeter of brain than humans, which seems to make it easier for them to switch from one task to another. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/4/7/800047.jpg)
![Elephants have learned how to evade electrified fences. When hungry for a meal, elephants CRAM have been known to tiptoe over fences, one leg at a time, to escape enclosures and freely hunt for food.](https://s3.crackedcdn.com/phpimages/imageset/0/4/0/800040.jpg)
![CRACKEDo A blue whale's heart is roughly the size of a Volkswagen Beetle, can weigh up to 1300 lbs (600 kg), its heartbeat can be heard from two miles away and its aorta is big enough for a human to fit through. Full scale model of a blue whale's heart tp://www.afsc.noaa.gov/nmml/education/cetaceans/blue.php](https://s3.crackedcdn.com/phpimages/imageset/0/4/8/800048.jpg)
![YOU ALREADY KNOW The adorably stupid- looking planarian flatworm can regrow any 1 body part you cut off... ...including its head. BUT DID YOU KNOW... THEIR NEW HEAD RETAINS THEIR OLD MEMORIES And being beheaded MIGHT not be their fondest recollection of you. Nemo me impune lacessit. Shomrat, T. and Levin, M. 2013. An auto tomated training paradigm reveals long. term memory in planaria and its persistence through head regeneration. Journal of Experimental Biology 216(21): 3799-3810 CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/4/9/800049.jpg)
![RATS can Why would ESTACS smell they evolve MARADO ionizing such an odd radiation! survival trait? Even DOGS can't do that! CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/4/6/800046.jpg)
![THE FROG THAT PRACTICES FUNCTIONAL NECROPHILIA! Explosive breedingis common reproductive strategy among frog species, but the females often die. One species - Rhinella proboscidea- has found a work-around. By squeezing rhythmically, the male can COAX astring of sticky eggs from the female's dead. lifeless body and is able to then externally fertilize them http://www.tandfonline.com/doi/abs/10.1080/00222933.2012.724720?journalCode=tnah20 ttp://www.the-scientist.com/Particles.view/articleNo/35675/title/Croakus-Interruptus/#articleComments http://phenomena.nationalgeographic.com/2013/02/26/male-frog-extracts-and-fertilises-eges CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/4/2/800042.jpg)
![Meerkats can naturally deflect bright light to see better. Those black circles around their eyes are basically built-in sunglasses. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/4/4/800044.jpg)
![Bald eagles mate for life and use the same nest each year. Like any married couple, they love home improvement, continually adding on to the nest. The largest on record was 20 ft deep, 9.5 ft across, and weighed nearly 3 tons. (It is unknown whether mating pairs who split up each get half.) http://www.learner.org/jnorth/tm/eagle/NestAbout1.html CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/5/0/800050.jpg)
![Penguins walk better than us. While their short legs make for inefficient walking, their waddle holds the key because it conserves way more energy than our walking habits. Scientists say that waddling makes for smoother energy exchange, almost like a pendulum, and can help pregnant women and people with disabilities or neurological problems use their energies better. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/3/9/800039.jpg)
![31 Eyebrow-Arching Animal Behaviors We Wish We Could Erase from Our Minds](https://s3.crackedcdn.com/phpimages/imageset/0/3/7/800037.gif)
![TICKS CAN SECRETE SMALL AMOUNTS OF ANESTHETIC SALIVA TO PREVENT YOU FROM FEELING THEM ON YOU. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/3/4/800034.jpg)
![The world's second fastest land mammal, the pronghorn, lives in North America. They're herbivores, so it's not clear why they're so fast -- scientists think it's because of false cheetahs that hunted them until 10,000 years ago. NOW YOU KNOW CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/3/5/800035.jpg)
![Since sharks become paralyzed when turned belly-side up, orcas ram them in the side to flip them over when they hunt them. This suggests that orcas know a little something about shark biology. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/3/8/800038.jpg)
![Elephants yell silently. CRACKED.COM They can communicate infrasonically, below the range of human hearing. A horny elephant could bellow about how horny he is, in an attempt to contact a potential mate up to 10 miles away, and we'd be none the wiser.](https://s3.crackedcdn.com/phpimages/imageset/0/4/1/800041.jpg)
![Cher Ami was a carrier pigeon who delivered a message after being shot through the chest During World War I, the U.S. carrier pigeon delivered messages in France. Her final, deadly heroic journey saved 194 soldiers who had been isolated from other American forces. NOW YOU KNOW CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/4/5/800045.jpg)
![31 Eyebrow-Arching Animal Behaviors We Wish We Could Erase from Our Minds](https://s3.crackedcdn.com/phpimages/imageset/0/3/6/800036.gif)
![Jewel beetles can feel infrared. CRACKED.COM They have receptors in their chests that can detect a forest fire dozens of miles away. While you or I might run in the opposite direction, they get all horned up and fly toward the fire (a charred, desolate wasteland is the perfect place to copulate in peace).](https://s3.crackedcdn.com/phpimages/imageset/0/2/5/800025.jpg)
![When not nursing, baby elephants seek comfort From sucking their trunks just like how human newborns suck their thumbs and pacifiers. Some adult elephants were also observed having the when same mannerism they are feeling nervous. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/2/4/800024.jpg)
![Pigeons have a gambling habit, just like humans. In a study, eight pigeons were given two options: a key that dispensed 3 pellets 100% of the time and another that dispensed 10 pellets 20% of the time. The first option gave the pigeons 50% more food, on average, but they only chose it in a fifth of the trials. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/2/7/800027.jpg)
![Pigeons can judge the quality of art. They need a brief introductory course from their trainers where they're shown examples of good and bad art. Once they complete it, they can recognize good and bad paintings using similar visual cues as humans. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/2/1/800021.jpg)
![A spectrographic analysis in an experiment revealed that wild parrots name their young. To nullify the possibility of the babies' signature calls (names) being genetic, some eggs were discreetly switched to foreign nests before they hatched. Each swapped parrot's name was similar to others in its adopted family (and different from those in its biological family). CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/3/1/800031.jpg)
![Chimpanzees really enjoy eating cooked food. When given a straight choice of cooked VS raw potatoes, chimps in a study picked cooked potatoes about 90% of the time. They made the same choice nearly as often even when they had to wait a little for the researchers to cook it, and they chose to carry raw potatoes some distance to be cooked 60% of the time. CRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/3/3/800033.jpg)
![Sonny, MD CRACKED.COM In 2007, an Australian comedy show successfully attained a medical degree for a dog, based on his significant proctology experience sniffing other dogs' bums.](https://s3.crackedcdn.com/phpimages/imageset/0/2/9/800029.jpg)
14 Brilliant Animals Who Found Themselves In Very Human Situations
![Dogs judge people, too. In a 2015 study, dogs were observed as they watched people refusing to help their owners open a container. Most of the dogs refused food from those people. GRACKED.COM](https://s3.crackedcdn.com/phpimages/imageset/0/2/2/800022.jpg)
![Moths CRACKED.COM Some moths emit a siren-like noise that jams bats' echolocation. Some also mimic bats, which freeze females in fear, SO males can mate with them.](https://s3.crackedcdn.com/phpimages/imageset/0/2/0/800020.jpg)
![The rat swarm that wouldn't show up to court GRACKED.COM In 1522, a bunch of rats were called to a French court to answer for decimating local barley farms. An unlucky young lawyer was appointed to represent them, but had to repeatedly request a new date because his clients refused to show up.](https://s3.crackedcdn.com/phpimages/imageset/0/2/3/800023.jpg)
14 Brilliant Animals Who Found Themselves In Very Human Situations
![Peacocks CRACKED COM Male peacocks sometimes make fake sex noises to attract more hens. By pretending to be sexually active, the male seems like a more attractive mate.](https://s3.crackedcdn.com/phpimages/imageset/0/2/8/800028.jpg)
![GRACKED.COM WASPS ARE MASTERS OF GEOMETRY. When building a nest, they use antennae to measure wall angles, creating rows, of perfect hexagons. Their trick is to start with the Y-sections (at equal 120 angles).](https://s3.crackedcdn.com/phpimages/imageset/0/2/6/800026.jpg)
![Ants get their steps in CRACKED.COM Scientists discovered that ants navigate using an internal pedometer (in a truly goulish way). They amputed some ants' limbs, gave others stilts, then observed them all travel toward a familiar destination. They took the same amount of steps, but wound up over- or undershooting their destination, depending on their new limb length.](https://s3.crackedcdn.com/phpimages/imageset/0/1/9/800019.jpg)
14 Brilliant Animals Who Found Themselves In Very Human Situations
![Pacific Striped Octopus CRACKED.C COM This octopus reaches out and taps its prey's far shoulder. The startled prey flees in the opposite direction- right into the octopus's mouth.](https://s3.crackedcdn.com/phpimages/imageset/0/3/0/800030.jpg)