Human Body
Exploring "Why" questions about Human Body
481 articles
Why do we touch our forehead when we did something stupid?
We don't all necessarily do that! Touching your forehead when you make a mistake is not universal, it is cultural! As a child, you may see your mother touch her forehead after an incident and you copy
Why do some sudden noises scare the crap out of us, while others go nearly unnoticed?
(This is purely from what I understand about the flight or fight response; I have done no research into whether this is an accurate explanation so take it with a grain of salt). If your ears cannot de
Why do some people have permanent small red veins in their eyes?
> I'm assuming that that's normal. How is this called and what's this all about? Yes, they are normal.
Why do sounds early in the morning appear much louder than they are during the day?
Less ambient backround noise. The world is still asleep, so the normal noise of life (traffic, kids, electricity humming in lines etc) is not as loud as it would be during the day when the world is aw
Why does it seem like I have to change my deodorant brand every year or so to avoid body odor?
The smell that emanates from your armpits is largely caused by the bacteria that makes its home there. Deodorants, in addition to smelling pleasant, discourage bacterial growth. Over time bacteria may
Why newlyweds should get blood tests
I'm sure someone can explain this better than I can, but its basically to see if they can have children and what their children's immunities and what not would closely correlate too. Again... I'm sure
Why do we experience a ‘burning’ sensation in our eyes if we haven’t slept for a while or immediately after waking up?
It might be that "crusty" discharge from your eyes called rheum ( a mixture of different kinds of cells, mucus, dust, etc.) that is released during sleep. It looks likes sand in your eyes hence the sa
Why does my stomach “growl” when I’m hungry?
Normally, your stomach muscles goes through a process called Peristalsis where it expands and contracts in order to move food around and keep digestion going. From what I understand, when you are hung
Why is it common for bears to be hit by trains?
Oh there is a simple explanation for this. Bears are the king of their land. They grow up being able to fight and kill anything in there area.
Why do big companies fear their workers unionizing?
Lets say you work for a company and you feel like you deserve a raise. You walk into your boss's office and you say, "Pay me more or I quit". Your boss can let you quit - it is easy to replace a singl