StyleList claims that Egyptians invented the first version of the flip-flop sandal around 4000 B.C. The oldest existing pair of flip-flops is on display at the British Museum.Know More
The version of the flip-flop displayed at the museum dates all the way back to 1500 B.C. The sandals are made from papyrus. Papyrus and palm leaves were the most common materials used to make flip-flops in ancient Egypt, according to StyleList.
The Masai tribe of Africa also made flip-flops. In this part of the world, the shoes were usually made from rawhide. The modern version of the flip-flop became popular in the United States after World War II, according to StyleList.Learn more in Inventions
Hair dye dates back to the Egyptians in 3400 B.C., when henna was used to cover up gray hair. A Roman doctor named Galen came up with a recipe for black hair dye in 100 A.D., which was tested and proved to be effective in 2006.Full Answer >
The first sundials were built by the Egyptians and the Babylonians. These sundials date as far back as 5,000 BC. However, the first evidently purpose-built sundial was not constructed until 800 BC.Full Answer >
Augusta Ada Byron King, Countess of Lovelace, commonly known as Augusta Ada Lovelace, invented the first version of what would later become known as computer programming. Specifically, Lovelace created a system that enabled an early version of a computer to calculate Bernoulli numbers.Full Answer >
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 >