The color of coffee mainly depends on a group of compounds called melanoidins. These are dark pigments formed during roasting during the so-called Maillard reaction, when heat...
Long ago, people already believed that certain shades were the basis of all others. As early as Antiquity, Aristotle put forward the idea that there...
When you heat sugar, you liquefy its crystals. At that moment, the sugar molecules (sucrose) move freely all around. As they cool down, these molecules...
Rust is mainly composed of hydrated iron oxides, primarily that good old hydrated ferric oxide (Fe₂O₃·nH₂O). It is this compound that gives rust its typical...
The tip of a match is not just a simple colored piece of wood: it is primarily composed of potassium chlorate, sulfur, and ground glass. Potassium chlorate...
Olive oil is rich in monounsaturated fatty acids (mainly oleic acid), with few polyunsaturated fatty acids. In comparison, sunflower oil mainly contains polyunsaturated fatty acids...
When liquid water cools down, its molecules gradually lose their thermal agitation (basically, they slow down their movement). Around 0 °C, the temperature drops enough...
Bleach is a solution based on sodium hypochlorite (NaClO). The main thing you'll find in it is this hypochlorite, usually mixed with water and a...
Towards the end of the 19th century, scientists discovered an intriguing phenomenon: certain materials spontaneously emit mysterious radiation capable of impressing photographic plates; this is...
When an already very cold ice cube is submerged in a drink at a higher temperature, its outer surface experiences a sudden temperature change called...
