★Polar bears have black skin under their white fur.★Ketchup was once sold as medicine in the 1830s.★Horses physically cannot vomit.★A blue whale's tongue can weigh as much as an elephant.★Cotton candy was co-invented by a dentist.★A day on Mercury lasts 59 Earth days.★If you lift a kangaroo's tail off the ground it can't hop.★Octopuses can taste with their arms.★Bananas are berries, but strawberries are not.★There are more than 1,000 chemicals in a cup of coffee.★There are only two countries in the world whose names start with 'The': The Gambia and The Bahamas.★There's a species of jellyfish that is immortal.★A jiffy is an actual unit of time: 1/100th of a second.★Sea cucumbers breathe through their butts.★Koalas have fingerprints nearly identical to humans.★The dot over the letter 'i' is called a tittle.★The French language has 13 different words for 'kiss'.★Scotland's national animal is the unicorn.★Humans are the only animals that blush.★The longest recorded flight of a chicken lasted 13 seconds.★The world's oldest known recipe is for beer.★The 'new car smell' is made of dozens of chemicals off-gassing from the interior.★The smell of freshly cut grass is actually a plant distress signal.★The Dutch were once the tallest people in the world.★The average person walks the equivalent of three times around the world in a lifetime.★Tigers have striped skin, not just striped fur.★There are more possible iterations of a game of chess than atoms in the observable universe.★It takes about eight minutes for sunlight to reach Earth.★Peanuts aren't nuts, they are legumes.★The average person spends six months of their life waiting for red lights to turn green.★The Mona Lisa has no eyebrows or eyelashes.★A lion's roar can be heard from up to 5 miles away.★Crows can recognize human faces and hold grudges for years.★Sea otters hold hands while sleeping so they don't drift apart.★A blue whale's heart is roughly the size of a small car.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Pteronophobia is the fear of being tickled by feathers.★Pigs can't look up at the sky without rolling over.★Saturn would float if you could find an ocean big enough.★A snail can have up to 25,000 teeth on its tongue.★Nintendo was founded in 1889 as a playing card company.★Hippos can't actually swim, they walk along the riverbed.★Most 'silver' spoons are actually made of stainless steel.★A snail can sleep for three years straight.★Dragonflies have been around for about 300 million years.★Cleopatra lived closer in time to the Moon landing than to the building of the Great Pyramid.★Octopuses have three hearts and blue blood.★Pineapples take about two years to grow.★So far, two diseases have successfully been eradicated: smallpox and rinderpest.★A hummingbird's heart can beat up to 1,260 times per minute.★Vincent van Gogh only sold one painting during his lifetime.★The shortest war in history lasted 38 to 45 minutes between Britain and Zanzibar.★A group of jellyfish is called a smack.★29th May is officially Put a Pillow on Your Fridge Day.★Sloths can hold their breath longer than dolphins can.★Bubble wrap was originally invented as wallpaper.★Cashews grow on the outside of a fruit, not inside a shell.★Elephants are the only mammals that can't jump.★The first computer mouse was made of wood.★A mosquito has 47 teeth.★A bolt of lightning is five times hotter than the surface of the sun.★The microwave oven was invented by accident when a researcher noticed a chocolate bar melted in his pocket.★Your nose can remember 50,000 different scents.★Avocados are toxic to most animals except humans.★A group of porcupines is called a prickle.★A hippo's sweat is pink.★A group of frogs is called an army.★More than half of all people alive today have never made a phone call.★A group of ferrets is called a business.★Butterflies taste with their feet.★Your tongue print is as unique as your fingerprint.★Sloths only poop about once a week.★In Switzerland it is illegal to own just one guinea pig.★Chewing gum while you chop onions helps keep you from crying.★Sharks existed on Earth before trees did.★A newborn panda is smaller than a mouse.★The longest hiccuping spree lasted 68 years.★Cows have best friends and get stressed when separated.★Voice actors for Mickey and Minnie Mouse got married in real life.★A crocodile can't stick its tongue out.★A 'jiffy' is one trillionth of a second in physics.★The oldest 'your mom' joke was discovered on a 3,500 year old Babylonian tablet.★Hot water freezes faster than cold water. This is called the Mpemba effect.★Humans blink about 15 to 20 times per minute.★The shortest commercial flight in the world lasts just 57 seconds.★A cloud can weigh more than a million pounds.★Ancient Egyptians slept on stone pillows.★Your stomach gets a new lining every 3 to 4 days, otherwise it would digest itself.★Snakes can help predict earthquakes.★The Hawaiian alphabet has only 13 letters.★The moon has moonquakes.★Goldfish can recognize human faces.★Wombat poop is cube-shaped.★Pigeons can recognize themselves in a mirror.★Bananas are curved because they grow towards the sun.★Rats laugh when tickled.★A newborn kangaroo is about the size of a jellybean.★A shrimp's heart is located in its head.★Starfish can regenerate their lost limbs.★You can hear a blue whale's heartbeat from more than two miles away.★The Statue of Liberty was originally intended to be a lighthouse.★A day on Venus is longer than a year on Venus.★The Great Wall of China is not visible from space with the naked eye.★Barbie's full name is Barbara Millicent Roberts.★It is physically impossible to hum while holding your nose.★Bees can recognize individual human faces.★Antarctica is the only continent without native reptiles or snakes.★An octopus has nine brains.★The fear of long words is ironically called hippopotomonstrosesquippedaliophobia.★There is a village in Norway called 'Hell' that freezes over every winter.★The first oranges weren't orange, they were green.★A group of crows mobbing a predator is literally called a 'murder patrol'.★The Eiffel Tower can grow up to 6 inches taller during summer.★The inventor of the Pringles can is buried in one.★Cherophobia is an irrational fear of fun or happiness.★Banging your head against a wall for one hour burns 150 calories.★The smell of rain has a name: petrichor.★There are more stars in the universe than grains of sand on every beach on Earth.★The human brain uses about 20% of the body's total energy.★Dolphins have names for each other.★Honey never spoils. Archaeologists found 3000-year-old honey in Egyptian tombs that was still edible.★7% of American adults believe that chocolate milk comes from brown cows.★Ostriches can run faster than horses.★Google processes more than 8.5 billion searches every single day.★A flock of crows is known as a murder.★We have mapped more of Mars than of our own ocean floor.★Cows have regional accents, they moo differently in different areas.★The first item ever sold on eBay was a broken laser pointer.★Dolphins sleep with one eye open.★A day on Jupiter lasts only about 10 hours.★A 'moment' was medieval unit of time equal to 90 seconds.★A group of owls is called a parliament.★A group of flamingos is called a 'flamboyance'.★Cats can't taste sweetness.★A group of pandas is called an embarrassment.★Humans share 60% of their DNA with bananas.

★Polar bears have black skin under their white fur.★Ketchup was once sold as medicine in the 1830s.★Horses physically cannot vomit.★A blue whale's tongue can weigh as much as an elephant.★Cotton candy was co-invented by a dentist.★A day on Mercury lasts 59 Earth days.★If you lift a kangaroo's tail off the ground it can't hop.★Octopuses can taste with their arms.★Bananas are berries, but strawberries are not.★There are more than 1,000 chemicals in a cup of coffee.★There are only two countries in the world whose names start with 'The': The Gambia and The Bahamas.★There's a species of jellyfish that is immortal.★A jiffy is an actual unit of time: 1/100th of a second.★Sea cucumbers breathe through their butts.★Koalas have fingerprints nearly identical to humans.★The dot over the letter 'i' is called a tittle.★The French language has 13 different words for 'kiss'.★Scotland's national animal is the unicorn.★Humans are the only animals that blush.★The longest recorded flight of a chicken lasted 13 seconds.★The world's oldest known recipe is for beer.★The 'new car smell' is made of dozens of chemicals off-gassing from the interior.★The smell of freshly cut grass is actually a plant distress signal.★The Dutch were once the tallest people in the world.★The average person walks the equivalent of three times around the world in a lifetime.★Tigers have striped skin, not just striped fur.★There are more possible iterations of a game of chess than atoms in the observable universe.★It takes about eight minutes for sunlight to reach Earth.★Peanuts aren't nuts, they are legumes.★The average person spends six months of their life waiting for red lights to turn green.★The Mona Lisa has no eyebrows or eyelashes.★A lion's roar can be heard from up to 5 miles away.★Crows can recognize human faces and hold grudges for years.★Sea otters hold hands while sleeping so they don't drift apart.★A blue whale's heart is roughly the size of a small car.★A rhinoceros' horn is made of keratin, the same stuff as hair.★Pteronophobia is the fear of being tickled by feathers.★Pigs can't look up at the sky without rolling over.★Saturn would float if you could find an ocean big enough.★A snail can have up to 25,000 teeth on its tongue.★Nintendo was founded in 1889 as a playing card company.★Hippos can't actually swim, they walk along the riverbed.★Most 'silver' spoons are actually made of stainless steel.★A snail can sleep for three years straight.★Dragonflies have been around for about 300 million years.★Cleopatra lived closer in time to the Moon landing than to the building of the Great Pyramid.★Octopuses have three hearts and blue blood.★Pineapples take about two years to grow.★So far, two diseases have successfully been eradicated: smallpox and rinderpest.★A hummingbird's heart can beat up to 1,260 times per minute.★Vincent van Gogh only sold one painting during his lifetime.★The shortest war in history lasted 38 to 45 minutes between Britain and Zanzibar.★A group of jellyfish is called a smack.★29th May is officially Put a Pillow on Your Fridge Day.★Sloths can hold their breath longer than dolphins can.★Bubble wrap was originally invented as wallpaper.★Cashews grow on the outside of a fruit, not inside a shell.★Elephants are the only mammals that can't jump.★The first computer mouse was made of wood.★A mosquito has 47 teeth.★A bolt of lightning is five times hotter than the surface of the sun.★The microwave oven was invented by accident when a researcher noticed a chocolate bar melted in his pocket.★Your nose can remember 50,000 different scents.★Avocados are toxic to most animals except humans.★A group of porcupines is called a prickle.★A hippo's sweat is pink.★A group of frogs is called an army.★More than half of all people alive today have never made a phone call.★A group of ferrets is called a business.★Butterflies taste with their feet.★Your tongue print is as unique as your fingerprint.★Sloths only poop about once a week.★In Switzerland it is illegal to own just one guinea pig.★Chewing gum while you chop onions helps keep you from crying.★Sharks existed on Earth before trees did.★A newborn panda is smaller than a mouse.★The longest hiccuping spree lasted 68 years.★Cows have best friends and get stressed when separated.★Voice actors for Mickey and Minnie Mouse got married in real life.★A crocodile can't stick its tongue out.★A 'jiffy' is one trillionth of a second in physics.★The oldest 'your mom' joke was discovered on a 3,500 year old Babylonian tablet.★Hot water freezes faster than cold water. This is called the Mpemba effect.★Humans blink about 15 to 20 times per minute.★The shortest commercial flight in the world lasts just 57 seconds.★A cloud can weigh more than a million pounds.★Ancient Egyptians slept on stone pillows.★Your stomach gets a new lining every 3 to 4 days, otherwise it would digest itself.★Snakes can help predict earthquakes.★The Hawaiian alphabet has only 13 letters.★The moon has moonquakes.★Goldfish can recognize human faces.★Wombat poop is cube-shaped.★Pigeons can recognize themselves in a mirror.★Bananas are curved because they grow towards the sun.★Rats laugh when tickled.★A newborn kangaroo is about the size of a jellybean.★A shrimp's heart is located in its head.★Starfish can regenerate their lost limbs.★You can hear a blue whale's heartbeat from more than two miles away.★The Statue of Liberty was originally intended to be a lighthouse.★A day on Venus is longer than a year on Venus.★The Great Wall of China is not visible from space with the naked eye.★Barbie's full name is Barbara Millicent Roberts.★It is physically impossible to hum while holding your nose.★Bees can recognize individual human faces.★Antarctica is the only continent without native reptiles or snakes.★An octopus has nine brains.★The fear of long words is ironically called hippopotomonstrosesquippedaliophobia.★There is a village in Norway called 'Hell' that freezes over every winter.★The first oranges weren't orange, they were green.★A group of crows mobbing a predator is literally called a 'murder patrol'.★The Eiffel Tower can grow up to 6 inches taller during summer.★The inventor of the Pringles can is buried in one.★Cherophobia is an irrational fear of fun or happiness.★Banging your head against a wall for one hour burns 150 calories.★The smell of rain has a name: petrichor.★There are more stars in the universe than grains of sand on every beach on Earth.★The human brain uses about 20% of the body's total energy.★Dolphins have names for each other.★Honey never spoils. Archaeologists found 3000-year-old honey in Egyptian tombs that was still edible.★7% of American adults believe that chocolate milk comes from brown cows.★Ostriches can run faster than horses.★Google processes more than 8.5 billion searches every single day.★A flock of crows is known as a murder.★We have mapped more of Mars than of our own ocean floor.★Cows have regional accents, they moo differently in different areas.★The first item ever sold on eBay was a broken laser pointer.★Dolphins sleep with one eye open.★A day on Jupiter lasts only about 10 hours.★A 'moment' was medieval unit of time equal to 90 seconds.★A group of owls is called a parliament.★A group of flamingos is called a 'flamboyance'.★Cats can't taste sweetness.★A group of pandas is called an embarrassment.★Humans share 60% of their DNA with bananas.

Tennis

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Tennis

First to 7 wins. Play solo against the CPU, or grab a friend for a 1 vs 1.

2 players: left uses W and S, right uses the arrow keys.

Move with ↑ ↓ or drag on mobile. Space to serve, P to pause.

How to play Tennis

You control the magenta paddle on the left, the orange paddle on the right is run by the CPU. Move your paddle up and down to bounce the ball back. Each return makes the ball a touch faster and adds to the rally counter. Score when the ball gets past the CPU. First to seven points wins the match. Use the arrow keys, W and S, or drag your finger on the play area on mobile.

Tips

Hit the ball near the top or bottom of your paddle to send it back at a sharp angle
The CPU is a little slower than you, wide angles often beat it
Stay near the middle when waiting for the next ball, you can react in either direction
Long rallies count too, your longest rally is saved as a personal best

About Tennis

Tennis is a colorful take on the original Pong, the 1972 Atari arcade game widely credited with kicking off the home video game industry. The mechanic is timeless: a ball, two paddles, gravity-free physics. Our version dresses it up with a teal court, a magenta and orange paddle pair and an amber ball. Perfect for a one-minute coffee break or a five-minute keyboard duel against the bot.

More versus games

Drop four: Stack four discs in a row. Beat the friendly bot.
Reversi: Flip your way to a bigger army. Othello against an AI.
Tic-tac-toe: Classic noughts and crosses against the computer or a friend, plus a tricky Ultimate mode.
Duo gunners: Two-player co-op run and gun. Blast through the waves with a friend and take down the boss.
Pixel duel: A two-player versus fighter. Punch, kick, block and fireball your way through a best of three.
Twin fists: A two-player co-op brawler. Clear waves of thugs from both sides and beat the boss together.

Browse the full arcade →

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