Tech & Science · 1933
A Dawn of Waves, Plastics, and Flight
Amid the depths of the Great Depression, 1933 proved to be a watershed year for scientific breakthrough and industrial innovation. From the birth of FM radio and synthetic plastics to bold cosmic discoveries, human ingenuity defied economic hardship.
- December 1933 | United States
FM Radio Patent Granted
Edwin Armstrong received patents for wideband FM radio, revolutionizing audio broadcasting with crystal-clear sound free from static noise.
- February 1933 | Aviation
Boeing 247 Takes Flight
Widely considered the first modern airliner, the all-metal Boeing 247 set a new standard with retractable landing gear and autopilot capabilities.
- March 1933 | Materials Science
Accidental Discovery of Polyethylene
Chemists Reginald Gibson and Eric Fawcett at ICI synthesized polyethylene by chance under extreme high pressure, birthing modern plastic.
- 1933 | Astrophysics
Fritz Zwicky Proposes Dark Matter
Astrophysicist Fritz Zwicky applied the virial theorem to the Coma galaxy cluster, inferring the presence of unseen missing mass now known as dark matter.
- 1933 | Physics
High-Resolution Electron Microscope
Ernst Ruska built an electron microscope that surpassed the theoretical resolution limit of optical light, opening a brand-new window into the microscopic world.
- April 1933 | Radio Astronomy
Karl Jansky Detects Cosmic Radio Waves
Karl Jansky revealed that persistent static noise recorded on his directional antenna originated from the center of the Milky Way galaxy.
- January 1933 | Civil Engineering
Golden Gate Bridge Construction Begins
Workers broke ground on San Francisco's Golden Gate Bridge, embarking on one of the greatest suspension engineering feats in history.
- February 1933 | Particle Physics
Positron Discovery Published
Carl D. Anderson published conclusive cloud-chamber evidence of the positron, confirming Paul Dirac's theoretical prediction of antimatter.
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