In the 17th century, the English physicist Robert Hooke discovered plant cells while examining cork under a microscope. He was the first to refer to the units as cells because their boxy appearance reminded him of monastery cells.
Robert Hooke, the Curator of Experiments for the Royal Society, performed extensive work with microscopes. He is also famous for discovering the law of elasticity, known as Hooke's Law, and for his book Micrographia in which he details his observations while using the microscope. He included in the book remarkably complex and intricate drawings of those observations. In addition, he was Surveyor to the City of London, and he helped to design a number of the landmarks in London.Learn More
Hans Lipperhey is credited with inventing the telescope because he filed the first patent application in the Netherlands on Sept. 25, 1608. The German-born Lipperhey lived in the Netherlands, where he worked as a spectacle maker.Full Answer >
The first modern hearing aid was produced during the 1800s by companies in Philadelphia and Germany. They used technology based on the carbon transmitter and electrical amplification advances of Thomas Edison and Alexander Graham Bell. The first carbon-type hearing aid was developed in 1989 by the Dictograph Company.Full Answer >
Although widely and erroneously credited to 19th-century British plumber Thomas Crapper, the modern flush toilet was actually invented in 1596 by Sir John Harrington. His treatise, titled "A New Discourse of a Stale Subject, Called the Metamorphosis of Ajax," described an early type of flush toilet.Full Answer >
In 1498, the Chinese created the first toothbrush as it is known today with bristles and a thin handle.Toothbrushes were mentioned as far back as 3,000 BC. They were described as chew sticks that were made of twigs with split threads at the end that could be rubbed vigorously against the teeth to remove food and plaque.Full Answer >