30 Unusual Facts No One Really Asked For, But Are Pretty Cool To Know

Otters carry around their favorite clam-opening rock in their armpit, and mothers will even pass on their favorite rock to their baby.

When a caterpillar enters a chrysalis and becomes a butterfly, it doesn't just sprout wings and legs. It essentially disintegrates into goo, and a new butterfly is built from that.

But that's not the weirdest part. The weirdest part is that it's possible to teach something to that caterpillar, and after it becomes goo and then re-forms as a butterfly, it still remembers what you taught it.

I noticed this when visiting museums, looking at old paintings: hands are often ‘hidden’, covered by flowers, clothing or they disappear in the shadows. I researched it later and learned it is true. Even the best painters struggled with drawing and painting hands. I look for hands in every painting now.

Chickens have the DNA for teeth, it’s just not turned on.

That divider at grocery stores that separates stuff on the conveyor belt is called a spratchet.

A weird fact is that honey never spoils; archaeologists have found pots of honey in ancient Egyptian tombs that are over 3,000 years old and still perfectly good to eat!

The swimming pools on the Titanic are still full of water to this day.

Pelicans have three stomachs and one of them is just for bones.

The minimum number of humans required for the species survival is about two hundred. The minimum number required for *any* level of survival is fifty. Below that, the inbreeding becomes a problem in the long term.

For me it is that the lighter was invented before matches.

If you eat polar bear liver it will kill a human and if a polar bear eats your liver it will too.

Great white sharks have never been seen mating. Ever. By anyone. Zero record made by a human. Strange considering what a mighty presence they have on humans.

Spiders curl up when they die because the thing that keeps their legs out is blood pressure, which releases when they die.

All cheetahs are genetically cousins. They almost went extinct thousands of years ago, down to like 100 individuals.

LASER is an acronym (Light Amplification by Stimulated Emission of Radiation) but in most cases should be LOSER because the light is oscillated, not amplified.

Octopuses have three hearts and blue blood so fascinating!

Off the top of my head, maybe that fact that the great cats roar, but do not purr; lesser cats purr but do not roar.

Your eyes have their own immune system. If your "normal" immune system discovers this it will attack your eyes and you'll go blind.

John Tyler, the 10th US president, was born in 1790 - that is during the first US president George Washington’s first term.

His grandson, Harrison Ruffin Tyler, is still alive - that is the current US president Joe Biden's term.

Think about it - just three generations (father,son and grandson) to cover the entire US presidential history.

Killer whales are a natural predator of moose.