Catalog of Inventions and Discoveries
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4 entries found
The Microscope and the Discovery of the Invisible World
Born from the lens-grinding craft of the late 1500s, the microscope let seventeenth-century naturalists see a world invisible to the naked eye. Robert Hooke's Micrographia (1665) introduced the biological term "cell," and Antonie van Leeuwenhoek's precision lenses revealed microorganisms in the 1670s, opening the field that would become microbiology.
late 1500s–1670s
X-Rays and the Ability to See Inside Matter
In November 1895, physicist Wilhelm Röntgen discovered a previously unknown form of radiation capable of passing through solid matter, which he called X-rays. His findings spread rapidly across the scientific world, giving physicians an unprecedented ability to see inside the human body and launching the field of diagnostic radiology within months.
1895
The Discovery of Penicillin and the Antibiotic Era
In 1928, Alexander Fleming observed that a mold killed nearby bacteria, but it took over a decade of further work by Oxford researchers Howard Florey, Ernst Chain, and Norman Heatley to turn that observation into penicillin, the first widely used antibiotic, ushering in a new era of treatable bacterial infection.
1928 (developed 1940s)
The Discovery of the Structure of DNA
In 1953, James Watson and Francis Crick proposed that DNA forms a double helix, a model that relied heavily on X-ray diffraction evidence produced by Rosalind Franklin and Maurice Wilkins and on base-ratio patterns identified by Erwin Chargaff. The discovery explained how genetic information is stored and copied, founding modern molecular biology.
1953