Biochemist and nutritionist Gladys Anderson Emerson is born. Together with Herbert Evans and Oliver Emerson, she isolated vitamin E in pure form

Animal nutrition researcher Donald Palmquist is born. An expert in lipid metabolism, he developed new strategies to improve the feeding of dairy cows

Physicist Hendrika Johanna van Leeuwen is born. She is known for her early contributions to the theory of magnetism

The grammarian and humanist Antonio de Nebrija signs a contract as a reader at the University of Salamanca. In it, he commits to giving two daily lessons: Eloquence and Poetry

The Arabist Miguel Asín Palacios is born. He studied Islamic philosophy and the relationships that linked Islamic and Christian culture

The Japanese Nozomi probe is launched to Mars. A series of failures in the electrical system made it impossible for it to reach the orbit of this planet

Code breaker Jean Valentine is born. During the Second World War, she worked at Bletchley Park breaking mathematical codes to intercept German communications

Pianist George Antheil is born. Together with the engineer and actress Hedy Lamarr, he patented a long-distance wireless communication system, considered the precursor of Wi-Fi

The doctor Carlos Chagas is born. He discovered a new infectious disease, American trypanosomiasis, describing its pathogen, its vector, its clinical manifestations and its epidemiology

Physicist and medical researcher Edith Hinkley Quimby is born. She was one of the first people to determine the distribution of the amount of radiation in patients' tissues

According to estimates by the UN, planet Earth reached five billion inhabitants on this day. Currently, it already exceeds eight billion

Biochemist Mildred Cohn is born. She pioneered the use of nuclear magnetic resonance to study enzymatic reactions, particularly adenosine triphosphate

Chemist Niveen Khashab is born. She is known for her innovative work on smart hybrid materials and the development of techniques to monitor intracellular antioxidant activity

Physicist Gertrude Scharff Goldhaber is born. She studied the cross sections of the neutron-proton and neutron-nucleus reactions and the emission of gamma radiation and absorption by nuclei

Chemist Albert Ghiorso is born. He codiscovered 12 elements: americium, curium, berkelium, californium, einsteinium, fermium, mendelevium, nobellium, lawrencium, rutherfordium, dubnium and seaborgium

The historic Apollo 11 space mission takes off. Four days later, Neil Armstrong and Buzz Aldrin set foot on the surface of the Moon, while Michael Collins flies in the command module

The first known remains of the hominid Paranthropus boisei are discovered by anthropologist Mary Leakey. This discovery took place in the Olduvai Gorge (United Republic of Tanzania)

Mary Sears, commander of the US Navy’s first oceanography unit during World War II, is born. As a scientist, she laid the foundations of modern oceanography

Mathematician María Josefa Wonenburger Planells, researcher in group theory and the theory of Lie algebras, is born. She was the first Spanish woman to obtain a Fulbright scholarship

Astronomer Julie Marie Vinter Hansen is born. She was widely recognized for her accurate calculations of the orbits of minor planets and comets

The Trans-Siberian railway is inaugurated. Its main line is 9,288 km and connects Moscow with Vladivostok, on the Sea of ​​Japan. It represented a great challenge for the engineering of the time

Pi Approach Day. The fraction 22/7 is equal to 3.1428…​, so this is the day of the year that is closest to the number π

The doctor Martina Castells i Ballespí is born. She was one of the first three women to enroll (1877) and graduate (1882) in Medicine in Spain

The western massif of the Picos de Europa becomes the first protected natural area in Spain, under the name Covadonga Mountain National Park

Gretchen C. Daily receives the Ramón Margalef Prize for Ecology. This ecologist and professor is known for integrating the values ​​of nature into decision making

Work begins on the Duro y Compañía Factory, in La Felguera (Asturias). It became the most important steel center in Spain. It is on the Red List of the Heritage of Hispania Nostra

Mathematician Irene Fischer is born. She was one of the internationally recognized scientists in the field of geodesy during the golden age of the Mercury and Apollo space missions

World Hepatitis Day. Its goal is to raise awareness about viral hepatitis, which inflames the liver and causes serious liver disease and liver cancer

Nobel Prize winner Dorothy Crowfoot Hodgkin dies. She determined the three-dimensional structure of molecules such as penicillin or insulin. The 3D structure is key to understanding its functions

Doctor Albert Neisser dies. He discovered the bacteria Neisseria gonorrhoeae, which causes the sexually transmitted infection called gonorrhea

Agronomist Thomas Lecky is born. His research on the breeding and improvement of cattle gave rise to new breeds adapted to the climatic conditions of Jamaica