When Were Fireworks Introduced?
The use of fireworks, or pyrotechnics, probably began when some prehistoric man mixed saltpetere (potassium nitrate) from his cooking with c
TellMeWhy
A wonderful and marvelous collection of answers to intriguing questions everyone ask about the world covering almost every subject, from science and history to art, language, mathematics, technology, and homeschooling
What Is Glass Made From?
Glass is made naturally from a fusion of silica (sand), soda and lime. This fusion can be achieved merely by lightning striking in a place w
What Is an Aerosol?
An aerosol consists of fine particles of liquid or solid substances suspended in the air, or in any other gas. It is not, as many people thi
Who Sent the First Radio Message?
Guglielmo Marconi is usually credited with sending the first radio message. Marconi was born in Bologna, Italy, in 1874 to an Italian father
When Was the First Gas Balloon Used?
The first gas balloon, filled with hydrogen, was released in Paris in August, 1783 which was designed by a French professor of physics, Jacq