Meteoroids contain a unique combination of chemical elements and isotopes that were present at the origin of the solar system. They are rich in iron, nickel, silicon,...
The time of Tutankhamun, around 1336-1327 BCE, corresponds to a particular period of ancient Egypt. He ascends to the throne when he is still just...
Natural arches primarily come from the work of marine erosion, in other words, the waves that continually crash against the rocky cliffs. When the waves...
The color of a gemstone comes directly from what it contains at its core. Each mineral has its own chemical recipe, sometimes very simple: for...
The ancient Egyptians had quite incredible notions in math and geometry for their time. Thanks to their advanced knowledge, they could easily draw perfect right...
Beneath our feet, the Earth remains a huge hot sphere, with a mantle located beneath the crust that contains a fluid rock called magma. In...
In natural salt pans, seawater or water from a saline spring accumulates and becomes trapped in natural basins. Under the action of the sun and...
Volcanic rocks are formed from the rapid cooling of magma that reaches the surface during a volcanic eruption. When this hot lava comes into direct...
Cold air has a higher density than warm air. This means that air molecules compress under low temperatures, thus occupying less volume. As a result: a denser...
The Colossus of Rhodes was built around 280 BC on the Greek island of Rhodes. It is a giant statue representing the sun god Helios, created to...
