50 Years Ago
- Animals
50 years ago, the U.S. Navy enlisted sea lions and other marine mammals
Today, dolphins and sea lions in the U.S. Navy Marine Mammal Program protect harbors and participate in research on animal health and well-being.
- Astronomy
50 years ago, astronomers challenged claims that Barnard’s star has a planet
Astronomers have been searching for planets around the sun’s close neighbor for decades.
- Health & Medicine
50 years ago, scientists suspected that lost sense of smell could be restored
Cells responsible for humans’ sense of smell can regenerate. Now, research spurred on by the pandemic could help answer questions about the process.
- Planetary Science
50 years ago, the first probe to visit Mercury launched
In the 1970s, NASA’s Mariner 10 became the first spacecraft to visit Mercury. Only one other probe has made the journey and another one is on its way.
- Climate
50 years ago, scientists warned of the ‘neglected dangers’ of heat islands
In 1973, scientists knew temperatures in cities were higher than in rural areas. Now, some cities are attempting to cool down with engineering.
- Physics
50 years ago, scientists dreamed of lasers that could kick off nuclear fusion
In the 1970s, lasers that could initiate nuclear fusion were a distant dream. Now, scientists are using such lasers to achieve fusion “ignition.”
- Chemistry
50 years ago, the quest for superheavy elements was just getting started
In the 1970s, scientists were on the hunt for superheavy elements. They’ve since found more than a dozen and are searching for more.
- Earth
50 years ago, mysterious glass hinted at Earth’s violent past
Like Hansel and Gretel followed a trail of breadcrumbs, scientists have followed tektites to the sites of major meteorite impacts.
- Earth
50 years ago, scientists thought they had found Earth’s oldest rocks
Even older rocks and minerals continue fueling debates over Earth’s crust, plate tectonics and even when life arose.
- Health & Medicine
50 years ago, scientists thought coffee might treat hyperactivity
Decades of follow-up research into whether caffeine can treat the symptoms of kids with ADHD has come up with more questions than answers.
- Astronomy
50 years ago, a search for proof that the Maya tracked comets came up short
The mystery of whether the ancient civilization tracked comets endures, but recent evidence hints the Maya tracked related meteor showers.
- Life
50 years ago, flesh-eating screwworms pushed scientists to mass produce flies
"Fly factories” dreamed up in the early 1970s have helped North and Central America keep screwworms in check for decades.
