Tact is the art of making a point without making an enemy.
A British scientist and inventor, best known for his pioneering technique in photography.
One of the greatest inventor of all time who produced a number of inventions in electric lighting and sound recording.
A British motorcyclist who became a racing driver and won the World Driver's Championship.
An English designer and major fashion innovator of the 1960s.
The Lateran Treaty creates the state of the Vatican City and guarantees to the Holy See full and independent sovereignty.
The Challenger is the first space shuttle to land on the runway at Kennedy Space Canter in Florida.
Nelson Mandela is freed from prison after being sentenced to life imprisonment in 1964 for sabotage, treason and violent conspiracy.
Janet Reno is appointed United States attorney general by President Bill Clinton, making her the first female U.S. attorney general.
Using data from the Wilkinson Microwave Anisotropy Probe satellite, astronomers provide the most detailed account yet of the makeup of the universe and confirm the "big bang" theory of its origin.

An American inventor who is one of the greatest inventors of all time was born on February 11, 1847, in Milan, Ohio, United States. Thomas Alva Edison produced a number of inventions that change the world - electric lighting, sound recording and many others. Edison began to work at an early age and continued to work right up until his death. Throughout his prolific career as an inventor, he was well known for his focus and determination. During his career Edison patented more than 1,000 inventions, including the phonograph, the electric light and the motion-picture camera. These three inventions led the foundation of big industries - phonograph, electric utilities, the film industry and record companies.
Edison died on October 18, 1931, in West Orange, New Jersey, United States.
Author : Dr. Nidhi Jindal