Who invented the cotton swab?

Cotton swab It was Leo Gersternzang, a Polish naturalized American. After fighting in the US Army in World War I, he worked for the Red Cross in Europe. In 1922, upon returning to the United States, he founded a company…

How to become a ranger?

Spending every day in contact with nature sounds perfect, but this profession also has its dangers. “The illegal extraction of heart of palm is a type of organized crime. Employees have already been killed by these people”, says forest ranger…

What are the dangers of microwaves?

»> First of all, great care must be taken when using the appliance to heat water. Inside it, the liquid boils without boiling – that is, without making bubbles. Result: Touching the container triggers a sudden boil, like an explosion,…

What is prohibited by law during a war?

Basically, international law prohibits causing unnecessary suffering to combat soldiers or the civilian population. We gathered seven situations prohibited by international treaties. Most of these agreements were signed in the Swiss city of Geneva, between 1864 and 1949, being expanded…