50 Years Ago
- Space
50 years ago, astronomers saw the surface of a distant star for the first time
In the 1970s, technological advances let scientists peer through stars’ atmospheres. Now, scientists can measure roiling gas in the stars themselves.
- Particle Physics
50 years ago, physics underwent a major revolution
The discovery of new subatomic particles cemented quarks as a cornerstone of the standard model of particle physics.
- Health & Medicine
50 years ago, U.S. drinking water sparked health and safety concerns
The discovery of potential cancer-causing agents in tap water led to the Safe Drinking Water Act — a law that continues protecting public health.
