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HOW OLD IS YOUR EAR?

Inside your ear the receptors which send sounds to the brain are called hair cells.
This kind of cells do not regenerate over time; with stress, like high noises, or normal aging they deteriorate.
The outer hair cells, which are tuned to sensing higher frequencies, generally tend to go first – hence the age-dependent hearing effect you have just tested.
Generally speaking, everyone can hear a 3000 Hz sound, while only 20 years old people can hear a 19000 Hz sound.

JUMP

A person's vertical jump depends on various factors, including their muscle strength, jumping technique, specific training, and natural physical abilities. However, their height is not directly related to how high they could jump, but rather to the type of training and skills they possess. On average, an untrained person might be able to jump vertically from a standstill between 30 and 50 cm. Athletes who train regularly for power and explosiveness (such as basketball or volleyball players, or track and field specialists) can have vertical jumps ranging from 60 to 90 cm or more.

YOUR EXTRA LARGE BODY!

Iridoscope is a device which magnifies 30 times your eyes to see its beauty and complexity.

For instances, you can see the thin, circular structure, known as iris, responsible for controlling the diameter and size of the pupil.

The pupil is the hole where light enters the eye; its size is controlled by the circular muscle called iris. When light conditions change, the pupil dilates or shrinks in order to keep a constant flow of light in the eyeball, dilating when it’s dark and shrinking in case of blinding light conditions.