Black holes are regions of spacetime where gravity is so strong that nothing can escape
Blue whales are filter feeders that eat krill
Blue whales are the largest animals on Earth
Blue whales can weigh as much as 33 elephants
Cardiac muscle is found only in the heart
Cartilage is a soft, flexible tissue that is found in the joints
Comets are made of ice, dust, and rock
DNA is a double helix structure
DNA is made up of nucleotides, which contain adenine, guanine, cytosine, and thymine
Exoplanets are planets that orbit stars other than our Sun
Fossil fuels are fuels formed from the remains of prehistoric plants and animals
Fungi are a kingdom of eukaryotic organisms
Hair and nails are made of keratin, a protein
Hummingbirds are the only birds that can hover
Hummingbirds are the smallest birds in the world
Hummingbirds can flap their wings up to 80 times per second
Jupiter is the largest planet in our solar system
Koalas are exclusively found in Australia
Koalas are marsupials native to Australia
Koalas sleep for an average of 22 hours per day
Mars is often called the "Red Planet"
Meteorites are meteors that reach Earth's surface
Meteors are objects that enter Earth's atmosphere and burn up
Mount Everest is located on the border between Nepal and Tibet
Mount Everest is named after Sir George Everest
Mount Everest is over 29,000 feet tall
Mount Everest is the highest mountain in the world, reaching 8,848 meters
Mount Everest was first climbed in 1953
Nebulae are clouds of gas and dust in space
Neptune is the farthest planet from the Sun
Octopuses are highly intelligent creatures
Octopuses have three hearts and nine brains
Platelets help to clot blood
Pluto was reclassified as a dwarf planet in 2006
Quasars are extremely bright objects that are powered by supermassive black holes
Red blood cells contain haemoglobin, which carries oxygen
RNA is a type of nucleic acid that is involved in protein synthesis
Smooth muscles are found in the walls of organs and blood vessels
Supernovae are powerful explosions of dying stars
Synapses are the gaps between neurons
Synthetic biology is the design and construction of biological systems
The alveoli are tiny air sacs in the lungs where gas exchange takes place
The Amazon Rainforest covers about 40% of South America
The Amazon Rainforest is home to more than 10 million species of plants and animals
The Amazon Rainforest is home to the Amazon River, the second-longest river in the world
The Amazon Rainforest is home to the largest number of animal species in the world
The Amazon Rainforest is home to the largest number of plant species in the world
The Amazon Rainforest is the largest rainforest in the world
The Amazon Rainforest produces more than 20% of the world's oxygen
The Andromeda Galaxy is the nearest large galaxy to the Milky Way
The Arteries carry blood away from the heart
The Beatles are considered one of the most influential bands in music history.
The Beatles were formed in Liverpool, England
The bones are made of bone tissue, which is a hard, mineralized tissue
The bones provide structure and support for the body
The brain is divided into the cerebrum, cerebellum, and brainstem
The brain is the most complex organ in the human body
The brainstem controls basic life functions such as breathing and heart rate
The bronchi are two tubes that branch off from the trachea and lead to the lungs
The bronchioles are smaller tubes that branch off from the bronchi
The capillaries are tiny blood vessels that connect arteries to veins
The cerebellum is responsible for balance and coordination
The cerebrum is the largest part of the brain and is responsible for thought, feeling, and movement
The circulatory system transports blood throughout the body
The Colosseum could hold up to 80,000 spectators
The Colosseum was built in the first century AD
The Colosseum was damaged by an earthquake in 847 AD
The Colosseum was once a stadium for gladiatorial contests
The Colosseum was used for public executions in the Middle Ages
The Drake equation estimates the number of extraterrestrial civilizations in our galaxy
The Eiffel Tower is 330 meters tall
The Eiffel Tower is a wrought iron lattice tower
The Eiffel Tower is the tallest structure in Paris
The Eiffel Tower was built for the 1889 World's Fair
The Eiffel Tower was originally intended to be a temporary structure
The endocrine system regulates hormone production
The Fermi Paradox is the question of why we haven't found evidence of extraterrestrial civilizations yet
The Forbidden City is now a museum
The Forbidden City was built in the 15th century
The Forbidden City was built to protect the emperor from his enemies
The Forbidden City was home to Chinese emperors until 1912
The Forbidden City was the imperial palace of China for centuries
The Gallbladder stores bile, which helps to break down fats
The Grand Canyon is over 277 miles long
The Grand Canyon is over a mile deep in some places
The Grand Canyon was formed over millions of years by the Colorado River
The Great Barrier Reef is home to over 1,500 species of fish
The Great Barrier Reef is home to the largest number of coral species in the world
The Great Barrier Reef is made up of over 2,900 individual reefs
The Great Barrier Reef is the largest living structure on Earth
The Great Wall of China is over 13,000 miles long
The Great Wall of China is visible from space
The Great Wall of China was built over a period of 2,000 years
The human brain contains approximately 100 billion neurons
The human brain is more complex than any computer
The hypodermis is the innermost layer of the skin
The Industrial Revolution began in Great Britain
The Industrial Revolution led to the rise of urbanization and industrialization
The integumentary system is the skin and its appendages
The Large Hadron Collider is located at CERN, near Geneva, Switzerland
The Large Hadron Collider is the world's largest particle accelerator
The Large Hadron Collider was used to discover the Higgs boson
The liver filters toxins from the blood
The lymphatic system helps to fight infection
The lymphatic system is also known as the immune system
The Mariana Trench is home to the Challenger Deep
The Mariana Trench is home to unique deep-sea creatures
The Mariana Trench is over 10,000 meters deep
The Mayan civilization was highly advanced in astronomy and mathematics
The Mayan civilization was known for its advanced calendar system
The Milky Way is a spiral galaxy that contains our solar system
The Mona Lisa has no eyebrows
The Mona Lisa is a famous portrait painting of Lisa del Giocondo
The Mona Lisa is housed in the Louvre Museum in Paris
The Mona Lisa was painted by Leonardo da Vinci
The Mongol Empire was founded by Genghis Khan
The Mongol Empire was the largest contiguous land empire in history
The Moon is Earth's only natural satellite
The Nile River flows through 11 countries
The Nile River is the longest river in the world
The Nile River is the main source of water for Egypt
The pancreas produces insulin and glucagon, which regulate blood sugar levels
The periodic table organizes the elements based on their atomic number and properties
The periodic table was created by Dmitri Mendeleev
The Pyramids of Giza are the largest ancient structures in the world
The Pyramids of Giza are the oldest of the Seven Wonders of the Ancient World
The Pyramids of Giza are the only one of the Seven Wonders of the Ancient World that still stands
The Pyramids of Giza were built over 4,500 years ago
The Renaissance saw the rise of humanism and individualism
The Roman Empire at its peak stretched from Britain to North Africa
The Roman Empire was conquered by Germanic tribes
The Rubik's Cube has over 43 quintillion possible combinations
The Rubik's Cube was invented in Hungary
The Sahara Desert is about the size of the United States
The Sahara Desert is home to the world's largest sand dunes
The Sahara Desert is the driest place on Earth
The Sahara Desert is the largest desert in the world by area
The Sahara Desert was once a lush, green landscape
The skin is made of three layers: the epidermis, dermis, and hypodermis
The skin is the largest organ in the human body
The speed of light in a vacuum is approximately 300,000 kilometers per second
The speed of light is a constant in the universe
The Statue of Liberty is a symbol of freedom and democracy
The Statue of Liberty was a gift from France to the United States
The Statue of Liberty was dedicated in 1886
The Statue of Liberty was designed by French sculptor Frédéric Auguste Bartholdi
The Statue of Liberty was designed to represent the goddess Libertas
The Sun is a giant ball of plasma
The Super Bowl is typically held in a major U.S. city
The Super Bowl is typically held on the first Sunday of February
The Taj Mahal is made of white marble
The Taj Mahal was built by Mughal Emperor Shah Jahan
The Taj Mahal was built to honor Mumtaz Mahal, the wife of Shah Jahan
The Titanic sank after hitting an iceberg in the North Atlantic Ocean
The Titanic sank in the North Atlantic Ocean in 1912
The Titanic was the largest ship in the world at the time of its sinking
The ureters are two tubes that carry urine from the kidneys to the bladder
The urethra is a tube that carries urine out of the body
The Venus flytrap is native to North and South Carolina
Uranus rotates on its side
A group of lemurs is called a conspiracy
The human heart can squirt blood up to 30 feet
Australia is wider than the Moon
The only letter not in the periodic table is J
There are more fake flamingos than real ones
Sharks are older than trees
Your tongue is not a single muscle
There are more stars in the universe than grains of sand on Earth
Lightning is hotter than the surface of the Sun
There’s a diamond planet called 55 Cancri e
Hawaii is drifting toward Japan
The smell of rain is called petrichor
Some fungi can turn insects into zombies
Honey never spoils
There are more trees on Earth than stars in the Milky Way
A whip crack is a tiny sonic boom
Over 2,000 thunderstorms occur at any time on Earth
A group of ravens is an unkindness
The masseter is the strongest muscle
You can’t sneeze with your eyes open
Space smells like seared steak and metal
A flock of flamingos is a flamboyance
The dot over “i” and “j” is a tittle
A group of ferrets is a business
The longest single-word palindrome is “rotator”
Vending machines kill more people than sharks
Fresh-cut grass smell is a distress signal
Cows don’t have upper front teeth
Switzerland bans owning just one guinea pig
The universe has no center
Some cats are allergic to humans
A glass of water contains more atoms than there are glasses of water in all the oceans
Ketchup was once medicine
Chewing gum dates back 9,000 years
A group of unicorns is a blessing
Wombat poop is cube-shaped
The Pringles inventor is buried in a Pringles can
There are more artificial trees than real ones
A group of rhinos is a crash
“Go” is the shortest complete English sentence
Hot water can freeze faster than cold
The Moon has moonquakes
The quietest room is at Microsoft
Polar bears have black skin
Humans can remember 50,000 scents
Six months of life is spent waiting at red lights
The oldest tree is over 5,000 years old
A group of owls is a parliament
Cows have regional accents
Chess has more permutations than atoms
A “butt” was a wine unit
Humans are the only animals that blush
Chickens can fly for 13 seconds
Pigs can’t look up
A group of hippos is a bloat
The shortest flight is under two minutes
Fear of long words is ironically named
The brain uses 20% of body energy
Orange was named after the fruit
Newborn pandas are mouse-sized
Australia has no active volcanoes
Sound travels faster in water
Challenger Deep is Earth’s deepest ocean point
A group of kangaroos is a mob
Coconuts kill more than sharks
Greenland sharks live over 500 years
Earth’s core is as hot as the Sun
A group of sloths is a bed
Lifetime saliva fills two pools
The stapes is the smallest bone
The largest snowflake was 15 inches wide
Deck shuffles exceed atoms on Earth
A group of hedgehogs is an array
Ocean plastic exceeds 150 million tons
There are more chickens than humans
People average 7,500 steps daily
North Korea’s animal is the Chollima
Sloths digest food for two weeks
The longest yawn was 1 hour 15 minutes
Some fungi glow
A woman invented the stop sign
The atmosphere is ~100 km thick
A group of armadillos is a roll
The oldest instrument was a vulture-bone flute
The brain is more active at night
Two weeks of life is spent kissing
The shortest war lasted under an hour
Bats are the only true flying mammals
Mount Everest isn’t farthest from Earth’s center
Bacteria outweigh all animals
The universe is expanding faster
Scotland’s national animal is the unicorn
Butterflies taste with feet
Most people can’t lick their elbow
A jiffy is real
The Great Wall isn’t visible from space
Books smell: bibliosmia
Phones are checked ~150 times daily
Humans contain enough iron for a nail
Go has more positions than atoms
Microwaves bake potatoes in 6 minutes
Earth is an oblate spheroid
Earth’s rotation is slowing
Images process faster than text
Red blood cells live 120 days
The biggest hot dog was 60 feet
There are 400+ shark species
Humans sleep 26 years total
“Hello” became common in 1827
Human lungs equal a tennis court
A group of pugs is a grumble
A group of moles is a labor
A group of squid is a squad
A group of crocodiles is a bask
A group of cats is a clowder
A group of platypuses is a paddle
Venus flytraps count how many times their trigger hairs are touched before closing.
Bananas are berries, but strawberries are not.
The human brain has no pain receptors.
Water can boil and freeze at the same time at its triple point.
Tardigrades can survive the vacuum of space.
The average cloud can weigh over a million tons.
Trees communicate and share nutrients through underground fungal networks called the “wood wide web.”
The Sun contains about 99.8% of the total mass of the solar system.
Your bones are stronger than steel by weight.
There are more neurons in the human gut than in a cat’s brain.
Some spiders travel long distances by riding electric fields in the air.
The color magenta does not exist on the visible light spectrum.
Gold is edible and used in some luxury foods.
Ancient Romans used urine as a cleaning agent.
The Moon is slowly moving away from Earth each year.
Hot peppers evolved their spiciness to deter mammals, not birds.
The Eiffel Tower grows taller during the summer due to heat expansion.
Human fingerprints and koala fingerprints are extremely similar.
Penguins propose to their mates by offering pebbles.
Oxygen itself does not burn; it only supports combustion.
A day on Mercury lasts longer than a year on Mercury.
The human eye can distinguish around ten million colors.
Slime molds can find the most efficient path through a maze.
Jellyfish existed before trees.
Diamonds can burn at high temperatures.
A teaspoon of neutron star material would weigh billions of tons.
Music activates the brain’s reward system in the same way food does.
Some frogs can freeze solid and revive when thawed.
The Moon has traces of rust on its surface.
There are bacteria that can feed on radiation.
Your brain slightly predicts the future to compensate for processing delay.
Birds do not urinate; waste exits in a single combined form.
Glass is an amorphous solid, not a liquid.
A single human hair can support several ounces of weight.
Ants produce their distinctive smell using formic acid.
Saturn is less dense than water and could theoretically float.
Humans share about 60% of their DNA with bananas.
There are taste receptors in your lungs and intestines.
Some metals can “remember” and return to a previous shape.
A cockroach can survive for weeks without its head.
The human body is slightly bioluminescent.
