Light actually exists as both a particle and a wave, and it’s known as a photon. Nothing we know of moves faster than the speed of light—but under certain conditions, light can actually be slowed down or even stopped.
The light from the Sun takes 8.5 minutes to reach Earth, so we never see the Sun as it truly is in real-time.

The faster you move, the more time slows down for you.

The coldest possible temperature is absolute zero, which is 0 Kelvin or -273.15°C.

Your mass never changes in space, but your weight does. In zero gravity, you’re technically weightless.

If the Sun suddenly became a black hole, the Earth would still orbit it—as long as its mass remained the same.

People aboard the International Space Station actually age slightly slower due to the effects of time dilation.

Sound cannot travel in space because it is a vacuum. So all the Sci-Fi movies with explosions in space are scientifically inaccurate.

There is enough energy in a single atom to power a light bulb for years but it’s nearly impossible to derive it out.

Strong gravity can actually bend light. In the case of a black hole, gravity can bend and even absorb it entirely.

The north and south poles of a magnet can never be separated. If you cut a magnet in half, you just get two smaller magnets, each with its own north and south pole.

Due to Hawking radiation, it’s possible for a black hole to slowly evaporate over time.

Raindrops aren’t shaped like teardrops—they’re actually shaped more like hamburger buns.

There’s something called the triple point of water, where it can freeze, melt, and boil all at the same time.

Atoms are mostly empty space—about 99.999% empty, in fact.

The flame of a fire does not cast a shadow.

Heat rises because hot air is less dense than cold air.

A crack in glass can actually travel faster than the speed of sound.

The smallest unit of measurement ever devised is called a Planck length.

While the universe is made of matter, antimatter also exists. Scientists can create it—but producing just a single gram would cost trillions of dollars.

The universe is constantly expanding—and it’s accelerating due to dark energy.