The first large-scale water purification plant was created in 1804 in Scotland by John Gibb, a bleachery owner in Paisley. This water filter was the first documented example to have used sand filters as a water purification method.Know More
Water purification and filtering trace their history back to ancient India and Egypt. Images depicting water treatment are visible in Egyptian tombs dating back to between the 15th and 13th centuries B.C.
In 1903, water treatment devices began using sodium ions that function as water softeners. The water softeners worked by means of a system of ion exchange, in which harmful ions are replaced by harmless ions.Learn more about Inventions
The United States Patent Office issued patent #174,465 to Alexander Graham Bell on March 7, 1876, for his device that could transmit speech electrically: the telephone. On March 10, Mr. Bell spoke the first intelligible words into the device: "Mr. Watson, come here, I want to see you."Full Answer >
Although it is unknown precisely who invented the abacus, the device was developed in China around 3000 B.C. It is highly compact and easy to use and forms the basis for modern calculators and computers.Full Answer >
Although scissors are popularly thought to have been one of Leonardo da Vinci's inventions, earlier examples of the device have been dated to between 3000 and 4000 years ago. While a single original inventor is not known, the earliest scissors are attributed to people of the Middle East.Full Answer >
The first robot was created by the Greek mathematician Archytas of Tarentum. It was a flying wooden dove that traveled up to 200 meters through the air by flapping its wings.Full Answer >