Science

Due to their chemical composition, comets smell like rotten eggs and urine.
The 3000-year-old mummy of Pharaoh Ramses II was given an Egyptian passport in 1974 so that it could be flown out to Paris for restoration.
Octopuses have a dominant arm.
Humans and giraffes have the same number of vertebrae.
Only 2% of all people have green eyes.
Stars can swallow up planets.
It's raining diamonds on Saturn.
Sunsets only exist because the Earth's atmosphere scatters the light like a prism.
People are born without kneecaps. These only develop in the first 3 years of life.
Humans inhale between 6-9 liters of oxygen per minute.
The Tyrannosaurus Rex probably had feathers.
Lightning is 5 times hotter than the surface of the sun.
The color of mirrors is green.
Ants do not have lungs, they breathe through tracheas.
Laughing too hard can cause a heart attack or choking, which can literally make you laugh yourself to death.
The cells in your brain eat each other. This process is called phagocytosis.
600 million years ago, a day on Earth had only 21 hours.
Identical twins have different fingerprints.