Who Invented the Super Soaker?
The toy called super soaker was invented by a man named Lonnie Johnson. And he isn’t only a toy inventor! Johnson has worked for…
Tag
Engineering
How Does a Paddle Steamer Work?
Paddle steamer is a ship or boat propelled by large rotating paddle wheels, either one on each side of the hull or one at…
What Is Granite?
Granite is a very hard kind of rock made up of small pieces of mica, quartz and felspar and sometimes other rocks as well.…
Why Does Venice Have so Many Canals?
Unlike most canals, those in Venice are not man-made. If anything, man has made the land around the canals. In the 7th Century this…
Who First Used Keys?
The first known form of lock and key was used by the Assyrians in the Middle East about 4,000 years ago. This was revealed by the discovery