Science
Exploring "Why" questions about Science
484 articles
Why does cold metal feel wet?
The feeling of "wetness" isn't actually a sense, but more of a combination of senses. If you've ever touches water through gloves, your hand feels like it's wet, but you're not actually getting any wa
Why do women generally prefer warmer temperatures?
They have smaller bodies, smaller mass. When you are just skin and bones it is hard to stay warm.
Why does our body produce lactic acid when we exercise?
Not enough oxygen to go around. Normally, any of our cells with mitochondria (which is most of them) would prefer to undergo aerobic respiration. It's very efficient, allowing you to get a buttload of
Why are there no drugs to help fight the common cold, only drugs to block the symptoms?
The common cold is really hundreds of different things, so you'd need hundreds of different drugs and have to match the right drug to the right cold.
Why do we get lightheaded when standing up quickly after sitting/laying down?
It's called orthostatic hypotension. When you are sitting your blood vessels contract or bend depending on how you're positioned, restricting the blood flow. When you stand up too quick, your blood ve
Why I see slightly different colours out of my left and my right eye
My optometrist explained it as: It has to do with the Blood, if you lay on your side, the blood will pool more into the eye closest to the ground. It visually makes the image your perceive warmer in o
Why does cabin pressure change during a flight, and not stay the same?
To keep the air inside the cabin at sea level pressure would require planes to be much stronger (and heavier). Letting some of the air out reduces the strength needed to prevent leaks, and it's still
why does the human body need O2 in oder to get rid of Carbon? Why cant it just release the carbon as a gas or something?
The body doesn't just take an O2 and stick a carbon onto it. The body has a very complicated set of chemical reactions, called the [Krebs cycle](_URL_0_), that it uses for energy. The Krebs cycle is h
Why don’t electrons fly into the nucleus?
Electrons have less mass than protons and neutrons. That gives them a bigger wavelength, so they can't be anywhere more specific than within an electron shell. They do have a nonzero probability of be
why is the ol sailor saying “pink sky at night sailors delight, pink sky in the morning sailors warning” so accurate?
Pink or Red sky comes from sunlight going through clouds on the horizion. The saying works where weather mostly moves east to west so clouds on the horizon are likely to be over the viewer if they're