The cells of the skin covering the body are renewed every 20 or 30 days. That means that throughout life we release skin around … a thousand times ! But such molts only affect the epidermis. The skin is the largest human organ, with an area of about 2 square meters and 4 kilos in weight. Its thickness varies from 0.5 millimeters for the testicles and eyelids to 4 mm, or even more, for the soles of the feet.
How many times do we change skin?
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.