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

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

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 reflex games

Math sprint: Solve as many math problems as you can in 30 seconds.
Snake: A modern take on the classic. Don't bite your tail.
Aim trainer: Click as many targets as you can in 30 seconds.
Reaction time: How fast can you click when the screen turns green?
Whack a mole: Bonk the moles before they pop back into their holes.
Stroop test: Read the colour, ignore the word. Brain twister in 30 seconds.

Browse the full arcade →

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