Santorio Santorio created the first thermometer. He was the first inventor to include a numerical scale on a device that measured changes in degrees of hotness or coolness. The thermometer he invented was the first designed to take a person's temperature.Know More
Earlier versions of the thermometer were called thermoscopes. They could indicate whether there was a change in temperature, but they could not measure the degree to which the temperature had changed.
Daniel Fahrenheit is credited with inventing the first modern thermometer. He invented an alcohol thermometer in 1709, and he invented the mercury thermometer in 1914. He also developed the first widely accepted scale used to measure temperature.Learn more about Inventions
Brahmagupta, a Hindu mathematician and astronomer, first used a dot underneath other numbers to represent the number zero in 628 A.D. He was the first to develop additive and subtractive operations that use zero.Full Answer >
Several products and procedures were invented in 1974. One example is the Post-It Note, which was created by American Arthur Fry. Since their invention, Post-It Notes have been sold in over 100 countries across the world and are still used over 40 years later.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 biggest inventions of 1994 were the CMOS image sensor and the first PlayStation games console. Other major inventions were the quantum cascade laser, the HIV protease inhibitor and the Segway.Full Answer >