ILLUSTRATES: Andre Toma Incited to kill by an imaginary head, he robbed houses and tortured the inhabitants. 1. He was born in Philadelphia in 1936 and, before he turned 2, he was adopted. Stephen and Anna Kallinger used to punish…
It depends on the radius. It is estimated that a discharge of 50,000 amperes, for example, is already harmless to a bather 125 m from the point of incidence. The current intensity decreases as the inverse of the square of…
It was in ancient Greece, in honor of Artemis, goddess of the hunt, revered on the sixth day of each month. According to mythology, this deity was represented by the Moon, the way in which it protected the Earth. The…
»> These animals have a specialized organ – precisely called an electrical organ –, composed of cells that differentiated from the muscles during their evolution. Just as muscles generate electricity when they contract, by the entry and exit of ions…
(Malte Mueller/Getty Images) Because our body has a preventive mechanism to avoid, say, overheating. It works like this: body temperature control is done by balancing the heat that the body produces and what it loses. “The main gains are the…
»> And yes. They have a complex circulatory system and can have from two to 15 pairs of hearts. Why so many? It’s just that they need to distribute the blood throughout the body and some species can reach 3…
The Professional Card, which originated the current Work and Social Security Card (CtPs), was created during the Getúlio Vargas government, in March 1932. It is a document that records professional history and guarantees rights such as salary, vacation, 13th salary,…
If we take into account the rapidity of the toxic effects on the organism, the most poisonous are the gases used as chemical weapons. In the chart below, we’ve rounded up four super-damaging substances that take a maximum of five…
FUTURE MARKET The robots and microscopic machines of nanotechnology will not only change medicine, engineering or informatics. You will be able to feel them in everyday life, even when you go shopping. At least, that’s what the designer claims. Koert…
It is the use of living organisms in medical treatments. Although there are indications that the Maya, in Central America, and the Australian aborigines were pioneers of biotherapy, the first official record is the application of larvae in wounds of…