𝕏 Sciquora

Some metals, like sodium and potassium, react violently when they touch water. The reaction releases a lot of heat and gas very quickly, which can cause flames or even explosions. That’s why these metals are stored in oil instead of being left exposed to air or moisture.

Scientists believe Earth’s core contains enormous amounts of gold — far more than what humans have mined. Most of this gold sank deep into the planet during Earth’s formation billions of years ago. Researchers estimate there’s enough gold in the core to cover the entire surface of Earth in a thin layer about 1.5 feet (around 0.5 meters) thick.

Chess has an insanely huge number of possible game combinations because every move creates many new choices for both players. As the game continues, those possibilities multiply rapidly. Scientists estimate there are around 10¹²⁰ possible chess games, which is far greater than the estimated 10⁸⁰ atoms in the observable universe. That’s why no two chess games are usually exactly the same and why even powerful computers can’t calculate every possible game.

Sharks are much older than most people realize. Ancient shark ancestors existed over 400 million years ago, swimming in Earth’s oceans long before dinosaurs even appeared. Trees, on the other hand, didn’t become common until about 350 million years ago. This means sharks were already living in the oceans roughly 50 million years before the first true trees grew on land.