Science Facts for Kids
Mind-blowing science facts
The mitochondria inside your cells were once free-living bacteria that were absorbed by larger cells about 1.5 billion years ago. They still have their own separate DNA as evidence of this ancient partnership.
Quantum entanglement allows two particles to be linked so that measuring one instantly affects the other, no matter how far apart they are. Einstein famously called this 'spooky action at a distance.'
Fire needs three things to keep burning: fuel, oxygen, and heat — sometimes called the fire triangle. Remove any one of them and the fire goes out.
Certain materials called superconductors conduct electricity with absolutely zero resistance when cooled to extremely low temperatures. A current started in a superconducting loop would flow forever without any power source.
Earth's magnetic poles have reversed hundreds of times throughout history — north becomes south and south becomes north. The last reversal happened about 780,000 years ago, and scientists think another could be slowly beginning.
Plants breathe through tiny holes in their leaves called stomata. A single leaf can have up to 300,000 stomata, and plants can open or close them to control how much water and gas they take in.
Pound for pound, human bone is stronger than steel and about four times stronger than reinforced concrete. Bone gets its strength from a clever mix of flexible collagen fibers and hard calcium crystals.
The universe is not just expanding — it is expanding at an accelerating rate. This mysterious acceleration is driven by something called dark energy, which makes up about 68 percent of everything in the universe.
Strong acids can dissolve metals and even bones, but pure sulfuric acid does not react with gold. That is why gold is used in some electronics — it resists corrosion from many harsh chemicals.
Your heart beats around 100,000 times every single day without you having to think about it. Over a lifetime, it will pump enough blood to fill about three supertankers.