On April 2, 1647, the German naturalist and scientific illustrator Maria Sibylla Merian was born. Even though she is not very well known for her achievements, she made significant contributions to entomology through the observation and documentation of the metamorphosis of the butterfly.
On February 28, 1953, American molecular biologist James D. Watson and English biophysicist Francis Crick announced to friends that they have determined the chemical structure of DNA.
On February 12, 1809, the English naturalist Charles Darwin was born. He popularized the term 'natural selection' as a milestone in modern biology, which was introduced in his masterpiece 'On the Origin of Species' in 1859.
On February 1, 1944, physician and medical researcher Oswald Avery together with his colleagues Colin MacLeod and Maclyn McCarty announced that DNA is the hereditary agent in a virus that would transform a virus from a harmless to a pathogenic version. This study was a key work in modern bacteriology.
On October 24, 1632, the Dutch tradesman and scientist Antonie van Leeuwenkoek, the inventor of the microscope, was born. He is commonly known as "the Father of Microbiology", and considered to be the first microbiologist.