If two pieces of the same type of metal touch in space, they will fuse together permanently in a process called “cold welding.”

#space

Laughter releases endorphins, lowers blood pressure, and reduces stress hormones — it’s a natural medicine for the body.

#psychology

People who sleep less than 6 hours a night have a higher risk of developing heart disease, diabetes, and weakened immune function.

#psychology

The fingerprints of a koala are so similar to humans that even forensic experts can confuse them.

#animals

Bamboo is the fastest-growing plant in the world; some species can grow nearly a meter in a single day.

#plants #rank

A simple lifehack: Writing tomorrow’s to-do list before bed reduces anxiety and helps you fall asleep faster.

#lifehacks

Neutron stars are so dense that a teaspoon of their material would weigh about a billion tons on Earth.

#space

The Hubble Space Telescope has provided images of galaxies billions of light-years away, essentially looking back in time close to the beginning of the universe.

#space

The Aztecs used cocoa beans as currency, trading them for food, clothing, and tools.

#history

Drinking a glass of water immediately after waking up jumpstarts metabolism and rehydrates the body after hours of sleep.

#lifehacks

In the Middle Ages, people believed garlic could ward off evil spirits and even protect against the plague.

#weird