Human Body
Exploring "Why" questions about Human Body
481 articles
Why does water bother our eyes so much?
This is dependent on the source obviously, but most water is not "clean", meaning it has particles of other things in it. Water in outdoor environments can have contaminants from farm runoff, dirt, al
Why does travelling make you feel so tired when you’ve just sat there for hours doing nothing?
Former flight medic here. There is lots of data on the "stressors of flight" (many of these stressors are also present in automobiles). As the vehicle moves, the sway and direction change cause you to
Why does sperm and bleach smell basically the same?
If I remember my awkward Catholic school sex ed, the female reproductive canal is (very slightly) acidic. Therefore, the male ejaculate has to be slightly basic (alkaline) to counteract it. Bleach is
Why are scars near impossible to get rid of?
Scar tissue is different to normal skin. It contains more collagen than regular tissue, and doesn't structure the same as regular skin, which is why it looks so different. It's also less flexible.
Why are the Beatles now treated like legends, when back then, they were seen as just some boy-band fad, soon to dissappear?
That is not a fair likeness. While they might be considered such a phenomenon, what they are great by is that they took music and made something entirely new with it. It was simply new and scary and e
Why are swearing words related to genitals and/or sexuality?
Swear words come from things we consider taboo or distasteful. In English-speaking society, we have a lot of taboos surrounding sex, even in this day and age. We also put a very high level of importan
Why do non-English speaking countries have so much English on their packaging and marketing?
English-speaking countries are so economically powerful, mainly through influence of the United States, that most countries include English on their products so that tourists or international customer
Why are burn marks more distinct than regular scars and what is the difference?
This - _URL_0_ - is my 3rd degree burn. If I don't stretch it, the colour is pretty normal. I got it in Feb 2012 and it's taken until now to be back to a normal colour and not red.
Why does our brain tend to remember the bad things that happend to us more often and intense than the good stuff?
Probably because in history, remembering bad events would help you to avoid them in the future and aid your survival. E.g. if you were attacked by a bear near a cave and lived, you would remember not
Why does a hot shower make my skin dry?
Moisture evaporates very readily from the skin, but a certain amount of moisture is retained by skin oils (technically called sebum) and a hot shower can wash away these oils. Skin moisturizer can rep