They prevent insects, especially mosquitoes, from finding us. For this, repellents use substances that have the ability to clog the microscopic pores of these little animals’ antennae when they approach us. It’s just that mosquitoes use their antennae to smell…

(Mariusika11/iStock) There are two types. The first uses sunlight only for heating, usually water. “This plate consists of a dark surface, which absorbs energy from the Sun and transforms it into heat”, says engineer José Kleber da Cunha Lima, from…

1. HEART OF THE MACHINEA pump makes the water move inside the coffee maker. First, the liquid goes from the reservoir to the boiler, and from there to the needle, where it penetrates the capsule. When you select whether to…

»> The secret of a caller ID is the modem it has, a device that converts telephone pulses into digital data and vice versa. When you make a call, your telephone handset transforms data such as your voice and your…

(/) ship Question Marcos Andrade Marques, Volta Redonda, RJ Steamship, steamship in English.The acronym is one of the so-called “naval prefixes”, which serve to indicate the type of propulsion of the vessel or its function. MS, for example, is motorship.…

Reader question – Bruno Wilhan Fonseca, Gramado, RS The first person to portray himself was the American Robert Cornelius, in October 1839. According to Stephen Perloff, editor of The Photo Review magazine, this is also considered the first photo of…

Scientists still haven’t fully unraveled this mystery, but believe that vultures enjoy spoiled food without getting sick thanks to their immune system and the potent gastric juice secreted by their stomach. But that doesn’t mean they prefer rotten meat to…

The skin of the lower eyelid is covered by so-called connective tissue. Beneath it is a layer of fat that supports it and keeps the skin distended. When this fatty layer decreases in size, the skin becomes slightly wrinkled, which…

Fortunately no. We researched the history of dozens of reality shows around the world and, as far as we could find out, the most serious event in this type of program happened right here, in Brazil. Do you remember: in…

In the world of retail, terms like «clearance» and «promotion» are often used interchangeably, but they carry distinct meanings and purposes. This article aims to clarify the nuances between these two concepts and shed light on when each is typically…