10 Mind-Blowing Science Facts You Should Know

Ready to impress your friends at the next quiz night? Here are 10 fascinating science facts that might just blow your mind.

## 1. Honey Never Spoils

Archaeologists have found 3,000-year-old honey in Egyptian tombs that was still perfectly edible. Honey's low moisture content and acidic pH create an environment where bacteria can't survive.

## 2. A Day on Venus is Longer Than Its Year

Venus rotates so slowly that it takes 243 Earth days to complete one rotation, but only 225 Earth days to orbit the Sun. So a Venusian day is longer than a Venusian year!

## 3. Octopuses Have Three Hearts and Blue Blood

Two hearts pump blood to the gills, while the third pumps it to the rest of the body. Their blood is blue because it uses copper-based hemocyanin instead of iron-based hemoglobin.

## 4. Bananas Are Radioactive

Bananas contain potassium-40, a naturally occurring radioactive isotope. But don't worry - you'd need to eat about 10 million bananas at once for radiation to be dangerous.

## 5. There Are More Trees on Earth Than Stars in the Milky Way

Scientists estimate there are about 3 trillion trees on Earth, compared to around 100-400 billion stars in our galaxy.

## 6. Hot Water Freezes Faster Than Cold Water

Known as the Mpemba effect, hot water can freeze faster than cold water under certain conditions. Scientists still debate why this happens!

## 7. Your Body Contains About 0.2mg of Gold

Most of it is in your blood. The total amount is worth about one cent at current prices.

## 8. Sharks Are Older Than Trees

Sharks have existed for about 400 million years, while trees appeared around 350 million years ago. Sharks are even older than dinosaurs!

## 9. There's a Planet Made of Diamonds

55 Cancri e, a super-Earth 40 light-years away, may have a surface covered in diamonds due to its high carbon content.

## 10. The Shortest War Lasted 38-45 Minutes

The Anglo-Zanzibar War of 1896 is the shortest war in recorded history. Britain won.

---

Want to test your science knowledge? Try our Science quiz on QuizKai!