Disposable diapers were invented by Paulistr in Sweden in 1942. The first disposable diaper was made from unbleached, creped cellulose tissue held in rubber pants.
Disposable diapers continued evolving in 1946, when a housewife invented a waterproof covering for cloth diapers. This covering was called a "boater" and had four snaps that replaced safety pins.
In the early 1950s, chemical engineer Victor Mills invented the first "real" disposable diaper. At the time of the invention, Mills worked at Proctor & Gamble. He used his grandchildren as test subjects, and within a couple of years, Pampers were born.
Today, disposable diapers have replaced cloth diapers in most households, and there are a number of different brands and sizes to choose from.Learn More
William Morton first demonstrated the use of ether as an anesthetic, but no one knows who actually invented anesthesia. After Morton's demonstration at Massachusetts General Hospital, several people came forward claiming they had discovered anesthesia much earlier.Full Answer >
In 1897, the pencil sharpener was invented by John Lee Love. He was issued a patent for it on Nov. 23, 1897. That style of pencil sharpener is still in use today in schools and offices around the world, according to About.com Inventors. It was one of several noteworthy inventions of 1897.Full Answer >
Algebra, in its earliest form, was first used by the Babylonians as early as 1700 B.C. It is possible that algebra was used before this time, but historical records are incomplete. However, the algebra used by early civilizations was much more rudimentary than the algebra currently in use today.Full Answer >
The concept of mapping the Earth using two sets of parallel lines, one running from north to south and the other from east to west, was first utilized by the Greek Eratosthenes. Hipparchus, another Greek, was the first to use these lines as coordinates for specific locations.Full Answer >