(/) This substance, used by the police to detect traces of blood, causes a reaction called chemiluminescence. Roughly speaking, this “swear word” describes a chemical reaction that releases energy in the form of light. Luminol is a powder – made…
– (Pablo Mayer) ILLUSTRATES Pablo Mayer The expression “four corners of the planet” has no origin in geometric logic (considering as “corner” any intersection between two straight lines, as a corner). It is believed, in fact, that it is a…
Long before Facebook… Long before Twitter… there was it. The social network you left O Brazilian addicted to social networks. O orkut! Created in January 2004 by a Google engineer, O Turkish orkut Büyükkökten, O site would only accept a…
The first official description of a system of shoe sizes was published in England in 1688. in the manual The Academy of Armory and Blazon, around this time, Randle Holme mentions an agreement between shoemakers to use a quarter-inch (0.635…
When they invented the clock, how did they know what time it was? Rafael Fernandes Junqueira, Mirassol D’Oeste, MT In fact, our ancestors knew the time of day long before the clock was invented. The mechanical clock is an invention…
Yes it is true. Incidentally, not only the heart but also practically the entire digestive system of this crustacean is located in the head. “The hepatopancreas is a glandular system that has liver, pancreas and stomach functions. It is located…
Black market ILLUSTRATES Jean Magalhães shooting Anonymity attracts all kinds of crime, creating the dark alley of the Deep Web: the Darknet. In a documentary by Deputya German dealer classified it as a practical and reliable system for sell armaments.…
This Japanese suicide ritual was surrounded by rules and ceremonies. The great warriors who performed it prepared themselves with purification baths, wrote poems and even had witnesses. The act aimed, in most cases, at repairing the honor of the suicide,…
Based on market research and the choice of essences that form the right fragrance. Perfumes appeared in 3000 BC At that time, the Egyptians used aromatic smoke during prayers. Hence the origin of the word: per (through) and fummum (smoke).…
Basically, it has atoms of gases bumping into each other, generating other gases and releasing energy in the form of light and heat. A brutal heat, which in the center of the Sun reaches 15 million degrees Celsius! This furnace…