How is the academy that trains FBI agents?

illustratesRodrigo Martins edition Felipe van Deursen It is a 2.2 square kilometer complex within a US Marine base. In addition to training agents, the center, located in Quantico, Virginia, offers specializations to police and military personnel. New agent training takes…

Why do the stars twinkle?

(hulya-erkisi/iStock) Because of an optical illusion. What actually blinks is not the stars, but the images we see of them. Bright light from these celestial bodies passes through more than 100 kilometers of Earth’s atmosphere before reaching our eyes. During…

How does the AK-47 work?

Edition Tiago Jokura and Felipe van Deursen In a simple and ingenious way, developed for years by the Russian Mikhail Kalashnikov in the 40s. Very cheap and resistant to cold, heat, water and sand, the rifle became the most widespread…

How was the city of Petra built?

Illustrations: Jonatan Sarmento/ () Age 2300 years Internal area 264 km2 visitors per year 1 million (in 2019) It was carved in stone. The very name of the city, in present-day Jordan, means “stone” in Greek. Over time, Petra, the…

How is the Mexican lucha libre?

It is a true show with a series of simulated fights staged by professional athletes. Although it is seen by many as a sport, it is a private activity, without a national confederation, as is the case with MMA. The…