Human Body
Exploring "Why" questions about Human Body
481 articles
Why Comcast “Xfinity” ads are allowed to continue claiming they are the fastest ISP in the country when they are clearly lying?
They offer 305mbit/s fiber residential service in certain metro areas - they are the fastest residential isp In those and likely other areas as well _URL_0_ edit: also they may be saying something lik
Why does your nose run when you east spicy things?
Nasal irrigation is a way for the body to protect sensitive and vulnerable tissues in the sinuses. Spicy foods trigger a feeling of actual heat (like real fire), even though it's not actually hot. The
Why is it hard to remember dreams?
It is difficult to remember dreams, because dreams take place in the brains pre-frontal cortex whereas memories and movements are stored in the cerebral cortex. Lucid dreams occur when our dreams drif
Why is reading good for the brain?
I can think of two important reasons. First reading and comprehension increases vocabulary and your understanding of language. Second is what you learn from the material.
Why can’t you fight dementia by training your brain?
You can, to an extent - it has been shown that (for example) bilingual people and people who keep their brain active can fight off the *effects* of dementia for longer. But a lot of types of dementia
Why do red objects and text appear blurrier than other colours in low-quality digital videos?
Digital sensors use what's called a [Bayer Filter](_URL_0_) over the sensor to filter out the colours. As you can see in the images on that page, red pixels are only a quarter of the total number of p
Why do we only have Black Friday sales once a year? Why can’t we have the deals all year long?
Some stores tried this. They found that they sell more if they have higher prices then drop them shortly for a sale than if they keep the sale-low prices all year. People just really like sales.
Why does a finger with a bandaid turn white and wrinkly and other parts of your body with clothing don’t?
Clothing tends to breathe. Try wearing thick socks and steel toed work boots in a hot environment for 10-12 hours and see how your feet look afterwards.
Why do my veins look blue when my blood is red?
Oxygenated blood is the bright red you are familiar with, blood without oxygen is a darker red. Due to the way that light is absorbed by the skin and muscle between your veins and the surface, the dar
Why do we get tired when we oversleep?
Sleep is a cycle. If you wake up in the wrong part of the cycle, you will probably be VERY groggy and slow to wake up. If you're sleeping outside of your normal pattern, your body doesn't know how to