Oxygen is magnetic: unlike most gases, liquid oxygen is paramagnetic and is strongly attracted to magnets. NEW
At very low temperatures, liquid helium becomes a superfluid that flows without friction, climbing container walls.
The World Wide Web, invented by Tim Berners-Lee in 1989, was created to help scientists share information.
Black holes can “sing”: NASA found sound waves from a Perseus Cluster black hole.
Laughter really heals: it lowers stress hormones, improves immunity, and increases blood flow by up to 20%.
Human body replaces skin every month: the outer skin cells are fully replaced about every 27 days.
Your brain generates enough electricity to power a light bulb: about 20 watts when awake!
The element helium was discovered on the Sun before it was found on Earth, by analyzing sunlight in 1868.
Water can boil and freeze at the same time at a specific pressure called the triple point.
A day on Venus is longer than its year: it takes more time to rotate once than to orbit the Sun.
Your stomach lining replaces itself every few days to prevent being digested by its own acid.
Light can behave as both a particle and a wave: this duality is at the heart of quantum mechanics.
A single gram of plutonium can release as much energy as over a ton of TNT.
Drinking enough water helps regulate body temperature, lubricate joints, and support healthy brain function.
Alexander Graham Bell invented the telephone in 1876, transforming global communication forever.
There are more stars in the universe than grains of sand on all of Earth’s beaches combined.
Your heart beats around 100,000 times a day, pumping about 7,500 liters of blood through your body.
The wheel, invented around 3500 BCE in Mesopotamia, is considered one of the most transformative inventions in history.
One day, Earth will lose its Moon: it’s slowly drifting away and may eventually escape orbit.
Octopuses have 3 hearts, and their blood is blue due to a copper-based molecule called hemocyanin.
Absolute zero is the lowest possible temperature: particles lose all thermal motion at −273.15°C.
Getting less than 7 hours of sleep regularly can increase the risk of heart disease, obesity, and diabetes.
Table salt is made of two dangerous elements: sodium and chlorine, but together they form something safe and edible.
Your tongue has thousands of taste buds that regenerate approximately every 2 weeks.
A year on Uranus lasts 84 Earth years: and it spins almost completely sideways.
Dry ice is solid carbon dioxide: it sublimates directly into gas without becoming liquid.
Your Fingernails grow faster on your dominant hand and more quickly in warm weather.
Regular physical activity reduces the risk of chronic diseases like heart disease, stroke, type 2 diabetes, and cancer.
In 1928, Alexander Fleming discovered penicillin, the world’s first true antibiotic, which changed modern medicine.
Inhaling too much oxygen can be toxic: our cells need a precise balance to function properly.
The human body contains over 600 muscles, and your gluteus maximus is the largest among them.
Hydrogen is the most abundant element in the universe, making up about 75% of its mass.
Inertia is the tendency of an object to resist changes in motion unless acted upon by a force.
Too much screen time, especially before bed, can interfere with your melatonin levels and sleep quality.
Some nebulas are so vast that light takes thousands of years to cross them.
An object in free fall experiences weightlessness, though gravity is still acting on it.
The smell after rain is called petrichor: it’s caused by oils released from soil bacteria.
The airplane was first successfully flown by the Wright brothers in 1903, marking the beginning of powered flight.
Exposure to natural sunlight helps your body produce vitamin D, which supports bone health and immune function.
The human brain uses about 20% of the body’s energy, despite being only 2% of its weight.
A teaspoon of white dwarf star matter would weigh as much as an elephant.
The speed of light is the cosmic speed limit: nothing can move faster in a vacuum.
Thomas Edison’s 1879 design for the electric light bulb made long-lasting indoor lighting possible for everyday use.
Goosebumps are a vestigial reflex that helped our ancestors appear larger and warmer.
A diet high in fiber can help regulate blood sugar, lower cholesterol, and improve digestion.
The Sun accounts for about 99.8% of the total mass in our solar system.
Some metals, like gallium, can melt in your hand: it liquefies just above room temperature.
The steam engine, refined by James Watt in the 18th century, powered the Industrial Revolution in factories and railways.
Resonance can cause bridges to collapse if vibrations match their natural frequency.
Your eye can distinguish around 10 million different colors, but not see ultraviolet naturally.
The Milky Way is on a collision course with the Andromeda Galaxy: they’ll merge in about 4 billion years.
Alessandro Volta invented the first true electric battery in 1800, enabling portable electrical energy for the first time.
Objects in orbit are constantly falling toward Earth: but their forward motion keeps them aloft.
Allotropes are different forms of the same element: like diamond and graphite, both made of carbon.
If you traveled at light speed, time would appear to stop from your perspective.
Some species of jellyfish are biologically immortal: they can revert to earlier life stages.
The first television system was demonstrated in the 1920s, merging visual and audio broadcast for mass audiences.