Who Invented the Telephone?
Who Invented the Telephone? Credit for the invention of the electric telephone is frequently disputed, and new controversies over the issue have arisen from...
Read More
What Are Birthmarks, Why Do They Occur, and How Are They Treated?
What Are Birthmarks, Why Do They Occur, and How Are They Treated? A birthmark is a benign irregularity on the skin which is present at birth or appears shortly after...
Read More
Who Invented the Alarm Clock?
Who Invented the Alarm Clock? The Greeks invented a prototype of the alarm clock around 250 B.C. They also built a water clock where the rising waters would both keep...
Read More
Who Invented the Radio?
Who Invented the Radio? Radio owes its development to two other inventions—the telegraph, and the telephone. In fact, all three technologies are closely related. Few...
Read More
Who Invented the Transistor?
Who Invented the Transistor? A transistor is a semiconductor device used to amplify or switch electronic signals and electrical power. It is composed of semiconductor...
Read More
When Did the Accurate Mechanical Clocks Appear?
When Did the Accurate Mechanical Clocks Appear? In Europe during most of the Middle Ages (roughly 500 to 1500 A.D.), technological advancement was at a virtual...
Read More
Who Invented the Quartz Clock?
Who Invented the Quartz Clock? In 1927, Canadian-born Warren Marrison, a telecommunications engineer, was searching for reliable frequency standards at Bell Telephone...
Read More
Who Invented the Gramophone?
Who Invented the Gramophone? Early attempts to design a music-playing gadget began in 1877 when Thomas Edison invented his tin-foil phonograph. The word ‘phonograph’...
Read More
Who Made Steel First?
Sir Henry Bessemer (1813-1898) of England invented the first process for mass-producing steel inexpensively. An American, William Kelly, had held a patent for ‘a system...
Read More
How Did Ancient Civilizations Record Time?
How Did Ancient Civilizations Record Time? After the Sumerians, the Egyptians were the next to formally divide their day into parts something like hours. Slender,...
Read More