It was while he was examining urine, seeking the philosopher's stone (the magic elixir needed to change base metals into gold), that German chemist Hennig Brand discovered phosphorus.

The height of the 984-foot-tall Eiffel Tower varies, depending on the temperature, by as much as 6 inches.

The mule possesses the sobriety, patience, endurance and sure-footedness of the ass, and the vigour, strength and courage of the horse. Operators of working animals generally find mules preferable to horses: mules show ...Read More

he AK-47 (shortened from Russian Avtomat Kalashnikova 1947) is a gas-operated assault rifle designed by Mikhail Kalashnikov, and produced by Russian manufacturer Izhevsk Mechanical Works and used in many Eastern bloc ...Read More

Created in 1888, De Beers Consolidated Mines, Ltd. is the most successful cartel arrangement in the annals of modern commerce. While other commodities, such as gold, silver, copper, rubber, and grains, fluctuated wildly in...Read More

Credit for inventing the electric telephone remains in dispute. There were several inventors who did pioneer experimental work on voice transmission over a wire and improved on each other's ideas. Innocenzo Manzetti, ...Read More