The Fact Ledger

A single NASA spacesuit costs about $12 million.

These suits are more than just clothes. They act like tiny, one-person spaceships that keep astronauts alive in the vacuum of space. Each suit provides oxygen, water, and protectio...

Your heart beats about 100,000 times every day and pumps 7,570 liters (2,000 gallons) of blood.

A small electrical system inside the heart keeps it beating at a steady pace. Over a 75-year life, a heart beats more than 2.5 billion times without taking a single break.

Vatican City is the smallest country in the world and fits entirely inside the city of Rome.

It covers only 109 acres of land. This makes it smaller than many city parks. It became its own independent nation in 1929.

Honeybees can recognize and remember individual human faces.

Bees have tiny brains but use a method called configural processing. They memorize the specific arrangement of eyes, noses, and mouths to tell people apart.

The first mechanical alarm clock could only ring at 4:00 AM.

Levi Hutchins invented this clock in 1787 because he needed to wake up early for work. He built the alarm to hit a bell at that specific time and did not include a way to change it...

Water expands by about 9% when it freezes into ice.

Most liquids shrink when they get cold. Water does the opposite because its molecules move into a fixed pattern that takes up more space.

Eating dark chocolate with at least 70% cocoa can lower your blood pressure and improve blood flow.

Cocoa beans contain natural compounds called flavanols. These compounds help the lining of your blood vessels relax, which makes it easier for blood to move through your body.

The cornea is the only part of the human body with no blood vessels and gets its oxygen directly from the air.

Blood vessels would block light and make your vision blurry. The cornea stays clear by absorbing oxygen through your tears and getting nutrients from a fluid inside the eye.

People sold tomato ketchup as medicine in the 1830s to treat stomach aches and diarrhea.

A doctor turned tomatoes into pills and claimed they could cure many illnesses. This happened decades before ketchup became a popular food topping.

Cats have 32 different muscles in each ear, letting them rotate their ears 180 degrees like tiny satellite dishes.

These muscles allow a cat to move each ear separately to find exactly where a sound is coming from. They can pinpoint a noise within five degrees without even turning their heads.

Airbus lost $6.1 billion on the A380 after engineers used two different versions of the same software to design the aircraft wiring — triggering massive delays and cost overruns

The design software in Germany didn't match the software in France. This tiny mistake meant that 330 miles of wiring were just one centimeter too short to plug in.

The paint on a single Airbus A380 weighs as much as a full-grown cow.

It takes about 950 gallons of liquid paint to cover this giant plane. Once the paint dries and the liquids evaporate, it leaves behind a solid layer weighing 1,430 pounds (650 kilo...

The Airbus A380 aircraft contains 300 miles of electrical cables.

This giant double-decker plane needs over 300 miles of cables to power everything from the cockpit controls to the TV screens at every seat. It takes a massive amount of wire to ma...

The Airbus A380 has a Maximum Takeoff Weight (MTOW) of 575 tonnes

This giant plane weighs 575 metric tonnes, making it the heaviest passenger aircraft ever built. To stay in the air, it uses four massive engines and wings that are large enough to...

Kiribati is the only country in the world that has islands in all four corners of the Earth: the North, South, East, and West.

This tiny island nation is spread across a giant patch of the Pacific Ocean. Because its islands cross both the Equator and the 180th meridian, it sits in all four hemispheres at t...

Jeans come from Genoa, Italy — sailors there wore tough blue trousers more than 400 years ago.

In the 1500s Genoa sailors needed very strong pants for hard work at sea. The French called the blue cloth "bleu de Gênes", which English speakers turned into "jeans", while a simi...

Strawberries are actually part of the rose family, making them cousins to roses, apples, and cherries.

If you look closely at a strawberry plant, you will see it has five-petaled flowers and jagged leaves just like a rose bush. They even grow fragrant blossoms that smell sweet befor...

Pineberries are real strawberries that look like they are inside out and taste exactly like pineapple.

These berries are white with bright red seeds. They are a natural mix of two wild strawberry types and are not made in a lab.

Garden strawberries have eight sets of DNA instructions, which is four times more than humans have.

Most living things, including people, have two sets of chromosomes. Strawberries have eight, giving them a massive library of genetic information to grow in different sizes and fla...

The Ghost Fungus is a mushroom that glows in the dark with a spooky green light to attract insect helpers.

This Australian mushroom glows all night long to grab the attention of beetles and gnats. When these bugs land on the mushroom, they get covered in tiny seeds called spores and car...

Every single Froot Loop tastes exactly the same, no matter what color it is.

Even though the loops are red, orange, yellow, green, purple, and blue, they all use the same 'froot' flavor blend. The different colors are just there to make the cereal look more...

Male mosquitoes never bite humans and spend their whole lives eating flower nectar instead.

Only female mosquitoes bite because they need the protein in blood to grow their eggs. Males don't have the right mouthparts to poke skin, so they act like tiny bees and pollinate...

You cannot hum for more than a second if you hold your nose tightly shut.

Humming works by blowing air through your vocal cords and out your nose while your mouth is closed. If you pinch your nose, the air has nowhere to go, and the sound stops instantly...

Ancient Greek athletes competed and trained completely naked in front of huge crowds.

The word 'gymnasium' actually comes from the Greek word 'gymnos,' which means naked. They believed a fit, strong body was the best way to show respect to their gods.

The center of our galaxy smells like rum and tastes like raspberries.

Astronomers found a giant cloud of gas in space filled with a chemical called ethyl formate. This is the exact same molecule that gives raspberries their sweet flavor and rum its d...

Alaskan wood frogs can go eight months without peeing by turning their own waste into a life-saving shield.

When these frogs freeze solid in winter, they stop going to the bathroom. Instead of getting rid of waste, they keep it in their blood to act like a natural antifreeze that protect...

The entire country of Monaco is smaller than Central Park in New York City.

Monaco is a tiny independent nation on the coast of Europe. It is so small that you can walk across the whole country in about an hour.

The 'Happy Birthday' song was private property for 80 years, and people had to pay money every time they used it in a movie or restaurant.

A big music company owned the rights to the song and collected millions of dollars in fees. It took a huge court case in 2016 to finally make the song free for everyone in the worl...

Carrots used to be purple or yellow until Dutch farmers turned them orange in the 1600s.

Farmers chose to grow orange carrots because they tasted sweeter and were less crunchy than the purple ones. Over time, these orange carrots became the kind we see in every grocery...

An ostrich's eyes are bigger than its whole brain.

Each eye is about 50 millimeters (2 inches) wide, about the size of a billiard ball. The eyes take up most of the space inside the skull. That leaves the brain much smaller by weig...

Ants don't have lungs and breathe through tiny holes on the sides of their bodies.

These tiny holes are called spiracles. They connect to a web of tubes that carry oxygen directly to every part of the ant's body.

Millions of trees grow every year because squirrels forget where they hid their snacks.

Squirrels bury nuts like acorns in the ground to save food for winter. When they can't find them later, those buried nuts sprout and grow into brand-new trees.

You share about half of your DNA with a banana.

Even though you don't look like a piece of fruit, your cells work in a very similar way. You and bananas both use the same genetic instructions to grow, divide cells, and turn food...

The world's most expensive pizza costs $12,000 and takes three full days to make in your own kitchen.

This tiny pizza is topped with three types of rare caviar and lobster from Norway. A team of three experts comes to your house to cook it using special tools and fancy ingredients...

Jellyfish are 95% water and have no brain, heart, or bones.

Because they are mostly water, they can float easily and drift with ocean currents. The water inside their bodies actually acts like a skeleton to help them keep their shape.

Before erasers were invented, people used rolled-up pieces of white bread to wipe away pencil marks.

The soft, squishy middle of a fresh bread loaf is naturally sticky. When you rub it on paper, it picks up the pencil lead just like a modern eraser does.

Neptune is the only planet in our solar system found using math before anyone ever saw it through a telescope.

Astronomers noticed Uranus was being pulled off its path by something invisible. They used math to figure out exactly where this mystery planet was hiding, and they were right!

The Sahara Desert sometimes gets covered in thick, white snow.

Cold air from Europe occasionally blows far enough south to reach the desert. When this freezing air meets moisture in the sky, snow falls and settles on the giant orange sand dune...

Sea otters hold hands while they sleep so they don't drift away from each other.

They form giant groups called rafts to stay safe. By grabbing paws or wrapping themselves in seaweed, they make sure the ocean waves don't pull them apart while they nap.

The Beatles were so popular that guitar sales in America doubled in just one year.

After the band played on TV in 1964, millions of kids wanted to be just like them. This caused a massive rush to music stores as teenagers everywhere started their own bands.

The 'Brown Note' is a total myth—there is no sound frequency that can make you lose control of your bowels.

While super low sounds can make your body vibrate or feel weird, they won't force you to run to the bathroom. Scientists have tested this with giant speakers and found it just does...

The famous 'Marshall Stack' was invented because a rock star wanted to be louder than a screaming crowd.

In 1965, Pete Townshend of "The Who" asked for a massive amplifier that could drown out his fans. Jim Marshall solved this by stacking two big speaker boxes on top of each other to...

A vinyl record has only one single groove that spirals for about 1,500 feet on each side.

A needle travels along this long, bumpy path from the edge to the center. As the needle hits tiny bumps in the groove, it vibrates to create the music you hear.

The famous 'rock on' hand gesture was actually a secret trick used by Ronnie James Dio’s grandmother to scare away bad luck and ward off the "evil eye."

Heavy metal singer Ronnie James Dio started using the sign in 1979 to give fans a special way to connect. He learned it from his grandma, who used it to protect people from the 'ev...

Queen recorded so many voices for 'Bohemian Rhapsody' that the recording tape brown coating wore off

The band sang their parts over and over to sound like a giant choir. They used the same piece of tape so many times that the brown coating wore off, making the tape transparent.

The term 'Heavy Metal' was first used in a rock song to describe the sound of a motorcycle.

The band Steppenwolf used the phrase 'heavy metal thunder' in their 1968 hit 'Born to Be Wild.' People loved the name so much they started using it to describe loud, powerful rock...

The famous '27 Club' is a myth because rock stars don't actually die more often at age 27 than at any other age.

Many people believe musicians are cursed to die at 27, but data shows this isn't true. While some famous stars did pass away at that age, researchers found it was just a coincidenc...

Music producers once crammed 30 musicians into a tiny room to make songs sound like a giant orchestra.

This 'Wall of Sound' technique layered dozens of instruments playing the same notes at once. It made rock songs sound massive and powerful even on tiny, cheap radios.

The Beatles played a concert so loud that they had to use the stadium's baseball announcement speakers just to be heard.

In 1965, concert speakers were too small for big crowds. When 55,000 fans started screaming, the band's music was completely drowned out.

Heavy metal music's scary sound comes from a 'forbidden' musical note combo once called the Devil in Music.

This sound is called a tritone and it sounds super tense and creepy. For hundreds of years, musicians avoided it because it sounded too evil, but the band Black Sabbath used it in...