»> The champion in height is the Angel jump, in the south of Venezuela. There, the water of the Churún River plummets 979 meters from the top of the Auyan Tepui mountain — suggestively, “devil’s mountain”, in the dialect of…
(/) Greek mythology would say that he appears whenever the goddess Iris leaves a colored trail in the sky, to convey to men the messages of Zeus, the almighty one of Olympus. The scientific explanation is far less romantic. The…
»> Just three ingredients: iron, water and air. “Rust is the result of the reaction between iron and oxygen”, says chemist Jorge Masini, from USP. That is: when these two elements come together, they tend to unite to form a…
ILLUSTRATIONS Alexandre Jubran QUESTION Michel Marcelo Monteiro, Sao Paulo, SP It does not need to protect itself, as it is adapted to live with the current it produces. The eel has special muscle structures with cells called electrocytes, which convert…
The great secret of the condom production process is vulcanization, that is, a chemical reaction that increases the resistance of the rubber without making it lose its elasticity. As a matter of fact, if vulcanization did not exist, ultra-elastic condoms…
Virtually all the most important. After the end of World War II, hero comics began to lose appeal. Editors believed that performing a “sex change” on well-known brands would serve to attract female readers. At Marvel and DC publishers, the…
It all depends on two factors: the depth with which the needle penetrates the body and the chemical composition of the applied substances. Basically, there are four types of injection: intradermal, subcutaneous, intravenous, and intramuscular. The difference is in the…
Reader Question – Agatha Veroneze, Posto da Mata, BA With several chambers with specific functions and tunnels that connect them. The arrangement of these sites depends on several factors, such as the species of ant (there are over 10,000!), its…
Because they are no longer needed. The ancestors of these animals, such as Archeopteryx, a mixture of bird and lizard that lived about 150 million years ago, had well-developed teeth. But, over time, the dentures lost their function and ceased…
– (Eduardo Belga/) 1. Son of a woman who considered herself a witch, Idi Amin was born in Uganda between 1924 and 1925 – the exact date and city are unknown. As a young man, he enlisted in the British…