What and why

A human has 46 chromosomes (23 pairs). Half of them are inherited from the mother, while the other half comes from the father. These structures contain all the genetic...

The United States of America has 50 states. The last, 50th state to join the country was Hawaii in 1959. Each state has its own constitution, laws, and government but is...

Birds migrate because they need to find more favorable conditions for living and breeding. In autumn, they fly to warmer regions where food is easier to obtain, and in...

Bracelets are a stylish accessory that can emphasize individuality and add zest to your look. However, many people ask themselves: how many bracelets can you wear on one...

The sky appears blue due to the scattering of sunlight in the Earth's atmosphere. As sunlight passes through the air, gas molecules scatter the light. Short-wavelength...

The sea appears blue because sunlight, when entering the water, refracts and scatters. The wavelength of blue light is shorter than that of red light, which means blue...

Seawater is salty because it contains dissolved salts, primarily sodium chloride (common table salt). These salts enter the oceans and seas through natural processes...

Sunglasses are essential for protecting the eyes from harmful ultraviolet (UV) radiation. They prevent damage to the cornea, retina, and lens, as well as reduce the risk...

Moles (nevi) are pigmented formations on the skin that can appear at any age and on any part of the body. Their formation is associated with the accumulation of...

It is believed that giving clocks as a gift is a bad omen, as they may lead to separation or misfortune. In some cultures, such a gift is associated with the countdown...

Apple is one of the most popular and affordable fruits. They can be eaten fresh, baked, added to salads or baked goods, caramelized. And they also make...

A skirt that constantly rises up when walking can become a real problem. This is not only inconvenient, but can also ruin the image. We at joy-pup will figure out why...