They are sculptures made by Indians, using figures of animals, objects and even people. For some tribes, totems serve to record the history of a group – considered a symbol of identity; for others, they are objects of worship in…

Introduced by the US Army in the 1950s, during the Korean and Vietnam wars, they were true armor, made of steel plates sewn into the cloth – which made them heavy and uncomfortable. The great revolution that allowed the emergence…

ILLUSTRATIONS Evandro Marenda 10. Convoluted answers PROGRAM Takara-Sagashi Adventure Nazotoki Battle Tore! (2011-2013) Watch the video In a frame of this Nippon Television program, a candidate is placed in a scenario that resembles an Egyptian pyramid, where a sphinx asks…

Reader Question – Orival Silva, Sao Jose dos Campos, SP It happens when plasma waves from solar storms travel through space and interact with Earth’s magnetic field and atmosphere. The phenomenon can occur day and night at the two poles…

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…