An abnormality during pregnancy could be seen visually thanks to Ian Donald's invention of the diagnostic use of ultrasound in obstetrics. In 1955, Ian Donald was the first to research the application of ultrasound in medical diagnosis.

A mountaineer, explorer, and philanthropist from New Zealand, Sir Edmund Percival Hillary KG ONZ KBE lived from 20 July 1919 to 11 January 2008. Tenzing Norgay and Hillary, two Sherpa mountaineers, were the first climbers to successfully reach the summit of Mount Everest on May 29, 1953. They were a part of John Hunt's ninth British Everest expedition. He represented New Zealand as both the High Commissioner to India and Bangladesh and the Ambassador to Nepal from 1985 to 1988.

Ernest Hemingway, whose full name is Ernest Miller Hemingway, was an American novelist and short-story writer who was awarded the Nobel Prize for Literature in 1954. He was born on July 21, 1899, in Cicero, Illinois, now known as Oak Park, and passed away on July 2, 1961, in Ketchum, Idaho. He was renowned for his writing's intense masculinity as well as for leading an exciting and well-documented life. His concise and clear prose had a significant impact on 20th-century American and British fiction.

American composer and conductor Jerrald King Goldsmith, who lived from February 10, 1929, to July 21, 2004, is well-known for his work in film and television scoring. In addition to Logan's Run, Planet of the Apes, Tora! Tora! Tora!, Patton, Chinatown, Alien, Poltergeist, Gremlins, Hoosiers, Total Recall, Air Force One, L.A. Confidential, Mulan, and The Mummy, he also composed the scores for five Star Trek films, three Rambo films, and five Rambo sequels. His 1997 opening fanfare for Universal Pictures made its debut with the release of The Lost World: Jurassic Park.

On July 20, 1969,  Commander Neil Armstrong and Lunar Module Eagle Pilot Buzz Aldrin touched down. Six hours and 39 minutes later, at 02:56 UTC, Armstrong became the first person to walk on the Moon.

Bruce Lee, also known by his Chinese name Li Jun Fan, was a famous American film actor who was born in San Francisco, California. He died in Hong Kong on July 20, 1973. Bruce Lee is credited with popularising martial arts films in the 1970s. Lee was raised in Hong Kong despite being born in San Francisco. His father was an opera singer and occasional actor, so he was exposed to the entertainment business at a young age. When the younger Lee first started acting in movies, he was frequently cast as a street kid or a juvenile offender.

American actor and comedian Robin McLaurin Williams passed away on August 11, 2014. He was born on July 21, 1951. He is regarded as one of the greatest comedians of all time and is well known for his improvisational abilities and the wide range of characters he created on the spot and portrayed on film, in both dramas and comedies.

An Indian actor who appeared in Bollywood movies, Rajendra Kumar Tuli (20 July 1927 – 12 July 1999). In a career spanning more than four decades and beginning in 1950, he made appearances in more than 80 movies. The "Jubilee Kumar" was how most people referred to him. In the 1960s, he was regarded as one of the most popular Indian actors. His son Kumar Gaurav appeared in a number of the films he also produced. In 1970, the Indian government presented him with the Padma Shri.

The Indian Tricolor is a source of national pride. It stands for harmony, diversity, bravery, and patriotism. The Indian Tricolor is made up of the four colours saffron, white, green, and blue. It symbolises the nation, its spirit, power, and majesty. The Indian flag is indisputably associated with the nation; however, it wasn't until 1947 that it was recognised as the nation's official flag. The Constituent Assembly approved the Indian Tricolor on July 21, 1947.