QUESTION Guilherme Cardoso, Sao Paulo, SP They are high frequency electromagnetic waves similar to light and rays X. The difference is that they carry a lot more energy. With high penetration power in matter, the rays gamma they can only…
The method used is called radioactive dating, it is based on the phenomenon of radioactivity and was discovered at the end of the 19th century. Radioactivity causes atoms to lose particles (protons or neutrons) in the form of radiation, causing…
No, the pigmentation that gives color to the iris of the eyes has nothing to do with sensitivity to light. Those who answer for this are the so-called photosensitive cells – the cones (in brighter places) and the rods (in…
»> No, it didn’t exist. As far as is known, it is a Greco-Roman legend that was appropriated by the European Renaissance in the 16th century. In mythology, the fountain of youth is a river that flows from Mount Olympus…
(/) He was a Brazilian businessman, owner of one of the first dubbing studios in Latin America. Herbert Richers, born in Araraquara (SP) in 1923 and died in 2009, in Rio de Janeiro, was already working with film production when…
IT SEEMS BUT IT IS NOTLemon shape, lemon smell, name lemon, but it’s actually a sour lime, another kind of citrus. O lemon lime (Citrus latifolia) has been cultivated for nearly 200 years in the US. The word “lemon” derives…
The greatest military fighter pilot of all time, the German Manfred von Richthofen, shot down 80 enemy planes of his country in the 1st World War. Its main war machines were the Albatros and the Fokker DR 1 triplane, which…
Reader Question Victor Manuel, Manaus, AM He was a Dutch graphic artist famous for his work with optical illusions. Despite being recognized for his originality and skill, he was seen by the artistic class as too intellectual and too poetic.…
(malerapaso/iStock) Cereal is a specific type of plant — when we talk about cereal, we mean the whole plant. The grain is the seed that the cereal produces. So easy. Cereals are a type of grass, a family of plants…
If you are imagining a monstrous plant, capable of swallowing a person, as in the cartoons, put it out of your mind: that kind of thing, dear reader, does not exist. The largest known carnivores are the creepers of the…