January 8, 1991
Cars started to become popular in the 1890s. Their success was partly due to the bicycle, which had given people a taste for a per...Read more
January 15, 1991
The first internal combustion engine was made by a Frenchman called Etienne Lenoir in 1859. He simply modified a steam engine to s...Read more
January 22, 1991
All clocks and watches work by 'counting' some event which takes a fixed period of time, like the swings of a pendulum. The higher...Read more
January 29, 1991
The forerunner of the telephone was the telegraph. By 1870 all major towns in Europe and America had telegraphs, sending messages ...Read more
January 5, 1991
Any electrical spark creates radio waves and acts as a transmitter. You hear sparks on a radio as interference. That's why lightin...Read more
February 12, 1991
The principle of magnetic recording was invented by a Danish telephone engineer called Valdemar Poulsen in 1899. He used an electr...Read more