School integration is often thought of as something that took place in the 1960s. But the first black student to desegregate a school by court order was an Iowa girl named Susan Clark in 1868.
Oh! Excuse me! Please pardon my sphincter, esophagus and throat.
The word 'OK' has only been around for 180 years, but it's become the most spoken word on the planet.
The color of American money goes back to the British colonies.
Scientists have identified the world's smallest animal - for now. It could be possible smaller creatures exist that have not yet been discovered.
How do hummingbirds drink sugary nectar and not get sick? Don't they need a balanced diet to stay healthy? Do they eat anything else?
How much homework kids should do is a subject of great debate.
Have a cat who just loves to scratch? Declawing is a major surgery that comes with serious long-term side effects – and it might not solve the problem anyway.
What exactly is inside those red fire extinguisher canisters, and does it work better than water?
Hagfish have been called the most disgusting creatures in the ocean. But what are they?
Birds spend a lot of time and energy singing, but they don't do it the same way in every season of the year. And some can't sing at all. What's the purpose of birdsong?
People have probably always wanted clean and healthy teeth. What they historically used to achieve dental hygiene might surprise you.