There are more hydrogen atoms in a single molecule of water than there are stars in the solar system.

:P

All the planets in the solar system can fit between the earth and the moon

Sharks are older than trees

Toads swallow food with their eyes. When they snag some food into their mouth they close their eyelids, and their eyes go inside and help push food down the throat before coming back up to the front of the head.

Time derivatives!

• Rate of change in position is called velocity
• Rate of change in velocity is called acceleration
• Rate of change in acceleration is called jerk
• Rate of change in jerk is called snap
• Rate of change in snap is called crackle
• Rate of change in crackle is called pop

Red grapefruits were originally created by planting yellow grapefruit near a radioactive source with the express purpose of creating mutations in the plant.

The moon is currently drifting away from the Earth. Eventually, that will make total eclipses impossible, so enjoy them while they last.

Fast forward a few billion years, and the Sun begins to swell up, engulfing the closest planets. At some point, the atmosphere of the Sun could begin to cause drag on the Moon, slowing it down. If so, the Moon begins to crash down on Earth. Once it reaches the Roche limit, it gets shredded into kwazillion bits, and the Earth will have rings, just like Saturn.

If you took all the DNA from every cell of one person and laid it in a straight line they would die

Something like a fifteenth of all humans who have ever lived are alive today.

Pigeons make milk.

There's 10⁹ living cells in a gram of surface soil, and in 20 km depth that reduces to 10⁶ cells per gram, but they're still alive and actively metabolizing down there! eating rock, mmhm tasty rock oh yeah! :p

they have cell turnover rates of hundreds of years though, so they age very slowly and multiply very slowly due to energy shortage.

https://en.wikipedia.org/wiki/Deep_biosphere

The chip on my shoulder wants to rattle off a litany of facts related to women's health, but I imagine this was intended to be a lighthearted post so I'll grab my popcorn and wait to see what others share

the wave-particle duality in quantum mechanics

There's more ships in the ocean by weight than there's fish.

Clouds.

• polar stratospheric clouds play an important role in creating the ozone hole
• the highest clouds on earth are about 80 km high
• in the mid-latitudes most rain is cold rain, that means it leaves the clouds as ice and melts on the way down
• pure water droplets without an aerosol inside (cloud condensation nucleus) freeze at about -40°C, sea salt aerosols make cloud droplets freeze at about -38°C, …

And there’s much more to be found.

Entropy is a record of everything that's ever happened in the universe. The units for it are Joules per Kelvin.

There a more hydrogen atoms in a single molecule of water, than there are stars in the entire solar system.