The inside of the nose is covered by a sensitive mucosa, lined in turn by hairs that filter the air. When we start one, the painful signal crosses the trigeminal nerve , which acts on a good part of the face, and the brain responds by making the eye on the same side cry. Another connection route is the nasolacrimal ducts , which evacuate the tears that constantly clean the interior of the visual organ into the nostrils. For this reason, when the crying is abundant, the typical runny nose occurs.
Why do we cry when we pluck a hair from our nose?
Japanese scientists create a 'washing machine for humans'
Can you imagine taking a relaxing bath in a machine that washes you with bubbles, plays relaxing music or videos?
Insect swarms generate as much electricity as a thunderstorm
Swarms of bees can generate an electrical charge of 1,000 volts per meter, a higher voltage density than thunderclouds and electrified dust storms.
This is what the Earth's magnetic field sounds like
The shield that protects our planet sounds 'pretty scary', according to ESA engineers.
Days were only 17 hours long 2.46 billion years ago
It was when the Moon was much closer to our planet. As the centuries pass, the Moon slowly recedes and the length of our day gradually lengthens accordingly.
Women are better at doing crosswords
A new study has revealed that women have a 'small but robust' advantage over time.