
Crab Facts: Claws, Shells & Secret Behaviors
Crabs are crustaceans found on every continent with over 7,000 species. Discover why crabs walk sideways, trade shells, and grow claws stronger than jaws.

Pigs are highly intelligent animals as smart as three year old humans. Learn about pig intelligence, cleanliness, communication, and surprising abilities.
Pigs are highly intelligent domesticated mammals that have lived alongside humans for approximately 9,000 years. Over 1 billion pigs exist worldwide today, making them one of the most common farm animals. Despite negative stereotypes about cleanliness, pigs are remarkably smart, clean, and emotionally complex creatures that rival dogs in cognitive abilities.
Pigs possess intelligence comparable to a three year old human child. They can play video games using joysticks, solve complex puzzles, and understand mirrors showing self awareness. Pigs learn their individual names within two weeks and respond when called. They can be trained to perform tricks, use litter boxes, and even detect landmines and truffles.
Pigs are actually extremely clean animals that refuse to soil their living areas when given adequate space. They designate specific areas for sleeping, eating, and bathroom activities. Pigs only appear dirty because they use mud to regulate body temperature and protect their skin from sunburn, not because they enjoy filth. Given proper facilities, pigs are cleaner than most farm animals.
The phrase sweating like a pig is completely inaccurate because pigs cannot sweat. Pigs have virtually no functional sweat glands, which is why they roll in mud to cool down. The mud acts as sunscreen and insect repellent while helping them regulate body temperature. When hot, pigs pant like dogs rather than perspiring.
Pigs use over 20 different vocalizations to communicate emotions, warnings, and needs. Mother pigs sing to their piglets while nursing. Pigs grunt in specific patterns to indicate hunger, fear, or contentment. They can recognize individual voices of other pigs and respond differently based on who is calling. Stressed pigs make higher pitched squeals.
Pigs have a sense of smell approximately 2,000 times more powerful than humans. This extraordinary ability makes them perfect for truffle hunting, as they can detect these rare fungi growing underground. Pigs have also been trained to detect illegal substances and even landmines. Their long snout contains millions of scent receptors.
Pigs possess remarkable long term memory and can remember experiences for years. They recognize individual humans and other pigs, recalling past interactions to determine friend from foe. Pigs can navigate complex mazes months after learning the route. They remember food locations and seasonal patterns, demonstrating planning abilities.
Humans domesticated pigs approximately 9,000 years ago in multiple locations independently.
Pigs were among the first animals brought by European colonizers to the Americas.
Wild boar hybridization with domestic pigs has occurred throughout human history.
Pigs played crucial roles in clearing forests and providing food in early agricultural societies.
Selective breeding created over 300 distinct pig breeds for various purposes.
Research proved pigs can play video games using joysticks with their snouts.
Studies showed pigs pass mirror self recognition tests demonstrating self awareness.
Scientists discovered pigs have over 20 distinct vocalizations for different situations.
Research revealed pig sense of smell is 2,000 times better than human olfaction.
Studies found mother pigs sing to their piglets while nursing using specific vocalizations.
Religious dietary laws in Judaism and Islam prohibit pork consumption.
Pigs symbolize prosperity and good fortune in Chinese culture.
Piggy banks became global symbols of saving money dating back centuries.
Charlotte's Web and Babe changed public perception of pig intelligence.
Miniature pigs became popular pets, though often grow larger than expected.
Before modern research revealed pig intelligence, they were widely considered dirty and stupid animals. Factory farming treated pigs as simple production units with minimal welfare considerations. Public perception was shaped by negative stereotypes rather than scientific understanding.
After decades of cognitive research demonstrated pig intelligence rivals young children and exceeds dogs, public awareness began shifting. Welfare regulations have strengthened in many countries. Sanctuary movements provide rescued pigs enriched environments. However, the vast majority of pigs still live in intensive farming conditions that do not accommodate their cognitive and social needs.
Pigs are as intelligent as three year old humans and can play video games using joysticks
The phrase sweating like a pig is wrong because pigs have no functional sweat glands and cannot sweat
Pigs can learn their individual names in just two weeks and respond when called by humans
A pig's sense of smell is approximately 2,000 times more powerful than a human's sense of smell
Mother pigs sing to their piglets while nursing using specific gentle grunts and vocalizations
Pigs are naturally clean animals that designate separate bathroom areas when given adequate space
Over 1 billion pigs exist worldwide, one of the most common farm animals
Pig intelligence research informs animal welfare policy and farming practices
Pigs serve as medical research models due to physiological similarities to humans
Sanctuary pigs demonstrate complex social lives when given natural environments
Public awareness of pig cognition is driving changes in farming regulations
How much do you know? Take this quick quiz to find out!
Smart as 3 year old humans. Pigs outperform dogs in cognitive tests and can play video games.
They cannot sweat at all. Pigs have no functional sweat glands, making sweating like a pig completely wrong.
They learn names in 2 weeks. Pigs recognize and respond to their individual names faster than some dogs.
2,000 times better smell. Pig olfaction detects truffles underground and has been used to find landmines.
Mother pigs sing to babies. Sows vocalize specific gentle sounds while nursing their piglets.
They designate bathroom areas. Given space, pigs never soil their sleeping or eating areas.
Pigs are as intelligent as three year old humans and smarter than dogs in many tests. They can play video games, solve puzzles, learn their names in two weeks, and show self awareness in mirrors. Pigs demonstrate empathy, use tools, and possess excellent long term memory.
This article is reviewed by the Pagefacts team.
Editorial Approach:
This article reveals pigs are as smart as 3 year old humans and can play video games, debunks the sweating like a pig myth since they have no sweat glands, and shows how mother pigs sing to their nursing babies.
Explore more fascinating facts in this category

Crabs are crustaceans found on every continent with over 7,000 species. Discover why crabs walk sideways, trade shells, and grow claws stronger than jaws.

Spiders produce silk five times stronger than steel by weight. Discover how spiders fly using electric fields, see in color, and engineer perfect webs.

Jaguars possess the strongest bite of any big cat and kill prey by crushing skulls rather than suffocating. They love swimming and hunt caimans in rivers.