Marine zoologist Anna Thynne is born. She built the first balanced marine aquarium. It served as the inspiration for London Zoo’s Fish House, the world’s first public aquarium

The chemist Antonio Casares manages to produce electric light for the first time in Spain. He did it in the cloister of the University of Santiago, using an electric arc

Inventor Percy Shaw registers a patent application for the cat’s eye road retroreflector. This indicator makes night driving easier and improves road safety

Marine biologist Shirley Winifred Jeffrey is born. She was a pioneer in the development of chemical methods to characterize pigments and apply them to the study of phytoplankton. She discovered chlorophyll c

Engineer and astronaut Judith Resnik is born. She worked in electrical and software engineering, also contributing to biomedical engineering research

The project for the creation of the American Museum of Natural History (New York) is signed. It is one of the largest scientific museums in the world, with more than 32 million specimens

Engineer Steve Crocker – from the University of California at Los Angeles (UCLA) – publishes the document Host software, considered the starting point of what is today the Internet

Bacteriologist Muriel Robertson is born. She showed that the parasite Trypanosoma gambiense, which causes sleeping sickness, changes its protein coat, making it very difficult to create vaccines

Mathematician Élie Joseph Cartan is born. He worked on Lie group theory and its geometric uses. He made contributions to mathematical physics, differential geometry and group theory

The Event Horizon Telescope team publishes the first image of a black hole located in the center of the Messier 87 galaxy

Botanist Graziela Maciel Barroso is born. Known in Brazil as the 'First Lady of Botany', she particularly investigated in the field of plant systematics

Architect Rita Fernández Queimadelos is born. She held positions never before held by a woman in Spain, such as municipal architect or provincial school architect

American astronomer Annie Jump Cannon dies. Her cataloging work was fundamental for the current stellar classification

The chemist Branca Edmée Marques de Sousa Torres is born. She defended his doctoral thesis on barium at the Sorbonne University in 1935, under the guidance of Marie Curie and André-Louis Debierne

Biologist Joaquín Fernando Garay de Oca dies. He introduced potato cultivation in Spain around 1793. He also worked to improve the management of agricultural resources in the Alto Aragón area

Physician and chemist Joseph Black is born. He is known for his discoveries of magnesium, latent heat, specific heat, and carbon dioxide

Chemist Stefanie Horovitz is born. During the First World War, she worked at the Vienna Radium Institute and confirmed the existence of isotopes of elements such as lead and thorium

Santiago Ramón y Cajal receives the Fauvelle Prize from the Paris Biological Society, one of its many international recognitions, such as the Helmholtz Medal or the Moscow and Nobel prizes

Launch of the first space station: Salyut 1. It remained in orbit for 175 days, until it almost ran out of fuel to maintain altitude

Physicist Montserrat Calleja is born. A specialist in bionanomechanics, she has investigated the mechanical properties of cells and their relationship with cancer and developed nanomechanical biosensors

The Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES) is formally founded. Among its objectives is the conservation and sustainable use of biological diversity

Earth Day is celebrated for the first time. It seeks to create a common awareness about the planet’s problems, such as overpopulation, pollution or global warming

Computer scientist Maria von Wedemeyer is born. She played an important role in the development of emulation capabilities in computing

Botanist Marie Charlotte Brockmann-Jerosch is born. She is known for her important research on alpine flora and phylogeography

After 10 years of efforts, the sequencing of the tse-tse fly genome is completed. This fly is the vector involved in the transmission of sleeping sickness

Aeronautical engineer Sébastienne Guyot is born. She collaborated in the design and construction of a small twin-engine airplane in 1924 or in the design of fuselages and hulls of several seaplanes

Francis D. Clarke and M.G. Foster obtains the patent for an electric hearing aid that uses bone conduction. However, it was not until 1901 that the first commercial hearing aid, the Acousticon, was manufactured

Physicists John Cockcroft and Ernest Walton announce that they have managed to disintegrate an atomic nucleus with artificially accelerated subatomic particles

Inventor Karl Drais is born. He invented the laufmaschine – running machine – which was later called draisiana, precursor of the velocipede (the bicycle)

Geologist and paleontologist Maria Gordon is born. She investigated the Dolomite mountain range (Italy) and challenged the idea of ​​its origin, with his theory of torsion in the Earth’s crust