England had really bet on its luck in terms of resources. A huge amount of coal, very close to the surface and easy to extract: it was...
The Eiffel Tower is made of a special material called puddled iron. This particular iron contains little carbon but more slag, impurities resulting from its...
When warm, moisture-laden air rises, its temperature gradually decreases. As it cools, the air becomes unable to hold all the water vapor it contained: it...
For a rock arch to appear, there must already be a rock with the specific characteristics needed. A solid, weather-resistant upper layer must rest on...
Milk is primarily composed of water, but it also contains proteins, lipids (that is, fats), lactose (a type of sugar), and vitamins. The lactose serves...
Oxygen acts somewhat like the chemical key that allows combustion to take place. Specifically, combustion is a vigorous chemical reaction where a fuel (often composed...
Flies naturally use light as a means of navigation. They move by instinctively following a light cue, often the sun or the moon. But in...
Pheromones are small and lightweight chemical molecules. This allows them to diffuse quickly and easily in the air, even over long distances. Their structures are...
Regions considered as non-seismic are usually areas where earthquakes are not truly expected. There, the lithosphere (the Earth's crust and the upper part of the...
Electromagnetism is the study of the link between electricity and magnetism, two closely connected phenomena. When an electric current passes through a wire, it creates...
