Human Body
Exploring "Why" questions about Human Body
481 articles
Why haven’t our bodies changed to make childbirth less painful?
So the only way that the process of childbirth would change is through evolution of some kind. The only way evolution happens is if the genetically superior reproduce and those who aren’t die. Theoret
Why does breathing in through your nose and out through your mouth work so well during exercise? I know it works well it just seems strange to me that it does.
Am I the only person that can't breathe in through my nose and out through my mouth when I exercise? I go running, and I can do that for the first quarter of a mile, but then I get too out of breath a
Why do people in movies automatically bleed through the mouth when they are injured in the belly area? It’s something that happens in real life?
It's possible but not too common. If someone is stabbed or shot in the stomach, most of the blood would drain down, not be coughed up. However, if someone is stabbed in the lungs, it's definitely more
Why do I sometimes ‘hear’ my heart beat through my ear when I lay my ear on a pillow?
You are hearing your pulse as it travels through your ear. The pillow blocks out most external sound, and you laying at rest causes you to focus on certain things.
Why do loud noises seem to physically hurt? Is it all in our brain signals? Do deaf people feel pain from them?
Pain is how our body signals to our brain that we're in a situation that's potentially causing us harm, so we're motivated to try to get out of that situation. Loud enough noises can physical damage y
Why can I barely hear a siren when I’m driving and it’s right behind me but they always wake me up in the middle of the night from far away?
Probably because in your car there's engine noise, road noise, and music, while at night it's quiet. Could that be it?
Why can’t we just have synthetic teeth?
We do, but they have to be screwed in to your jawbone with titanium screws. Natural teeth are glued in place by a layer around the base of the tooth called the periodontal ligament. It acts as a cushi
Why were futurist so optimistic about the year 2000?
Futurists of the 20th century merely used the year 2000 as a distant, exotic-sounding future year. Their optimism was based on projecting their economic system (capitalism or communism) into the futur
Why does it seem like almost nobody in the world wears socks?
I have no idea what planet you are from, but here on Earth we men regularly wear socks. While I admit to working from anecdotal evidence I can't think of a signle friend who doesn't Is it possible som
why, when intoxicated, does it feel like everything is spinning when you close your eyes but stops spinning when you open them?
the fluid in your inner ear keeps you orientated and standing upwards, although when your drunk certain functions in your brain don't work as well or as they are meant to. So if you've had a bit too m