
Scars are a repair tissue made mainly of collagen, which forms when a wound passes the outermost layer of the skin and reaches the dermis. As the National Institutes of Health explain, collagen fibers are arranged differently and hair, glands and nerves are missing. A scratch on the finger disappears …

Because in some countries the ground floor is on the first floor and in Italy it is not: it is an ancient convention
Why in Italy is the first floor above the ground floor, while in the United States it coincides with it? The difference depends on numbering conventions developed over time. In Italyand in many other European countries, when someone answers the intercom, telling us that the studio is on the first …

Two human figures created with a rare painting technique from 35,000 years ago found in South Africa: the stencil
In the rock shelter of La Rochelle, in South Africa, two anthropomorphic figures created with the stencil technique, previously never documented in the rock art of Southern Africa, have been identified. Their chronology and authors remain unknown. Two small anthropomorphic figuresmade with one technique never previously documented in southern Africawere …


