Sir David Attenborough is a renowned British broadcaster, natural historian, and author, celebrated for his extensive work in nature documentaries. 

Born on May 8, 1926, Attenborough has dedicated over seven decades to exploring and documenting the natural world. His illustrious career with the BBC began in the 1950s, and he became a household name with his groundbreaking series "Life on Earth" in 1979. Attenborough's distinctive voice and engaging storytelling have brought the wonders of the natural world into millions of homes, raising awareness about the beauty and fragility of our planet. 

His contributions to wildlife filmmaking have earned him numerous awards and accolades, including knighthood in 1985. Attenborough continues to inspire generations to protect and cherish the environment through his passionate advocacy for conservation and sustainability.

Alexander Fleming was a Scottish bacteriologist and pharmacologist, most renowned for his discovery of the antibiotic substance penicillin in 1928. Born on August 6, 1881, in Lochfield, Scotland, Fleming's groundbreaking work revolutionised the field of medicine.

While working at St. Mary's Hospital in London, he observed that a mould called Penicillium notatum had killed a surrounding colony of bacteria. This accidental discovery led to the development of penicillin, the world’s first true antibiotic, which has saved countless lives by effectively treating bacterial infections. Fleming’s pioneering research earned him the Nobel Prize in Physiology or Medicine in 1945, shared with Howard Florey and Ernst Boris Chain, who furthered his initial work to make penicillin widely available. 

Fleming’s contributions laid the foundation for modern antibiotics and transformed medical practice, making previously fatal infections treatable. 

Katherine Johnson was an American mathematician whose calculations were critical to the success of the United States' space missions. Johnson displayed exceptional mathematical abilities from a young age, graduating from West Virginia State College at 18 and later joined the National Advisory Committee for Aeronautics (NACA), which would become NASA. 

Her work included calculating the trajectories for the Mercury and Apollo missions, most notably John Glenn's orbital flight in 1962, where Glenn specifically requested that Johnson verify the computer's calculations. Despite working in a segregated environment, Johnson's contributions were crucial to the success of America's space exploration efforts. 

Her story gained widespread recognition with the 2016 film "Hidden Figures," which highlighted her and her colleagues' roles in NASA's achievements. Johnson's legacy as a pioneering African-American woman in STEM continues to inspire future generations. 

Jack Leslie was an English footballer whose remarkable career is often overshadowed by the racial discrimination he faced. Born on August 17, 1901, in Canning Town, London, Leslie was a talented forward who played for Plymouth Argyle from 1921 to 1934. During his time with the club, he made over 400 appearances and scored 137 goals, becoming one of their most prolific scorers. 

Leslie's skill on the pitch earned him a call-up to the England national team in 1925, which would have made him the first black player to represent England. However, the selection was controversially rescinded, allegedly due to the colour of his skin, highlighting the racial prejudices of the time. Despite this setback, Leslie continued to excel at club level, earning respect and admiration from teammates and fans alike. 

His legacy is remembered not only for his footballing prowess but also for the barriers he faced and the resilience he showed in the face of racial discrimination; a legacy that continues to inspire discussions about race and equality in sports.