The year 1978 produced a remarkable cluster of breakthroughs across medicine, space technology, genetics, and astronomy. The single most famous event was the birth of the world’s first baby conceived through in vitro fertilization, but that was far from the only milestone. From the first GPS satellite to synthetic human insulin, 1978 reshaped science and public policy in ways still felt today.
The First IVF Baby
At 11:47 PM on July 25, 1978, Louise Brown was delivered by cesarean section at Oldham Hospital in Manchester, England, becoming the first human ever conceived outside the body. Her mother, Lesley Brown, had been unable to conceive naturally due to blocked fallopian tubes and was referred in 1976 to gynecologist Patrick Steptoe, who suggested an experimental technique to bypass the blockage entirely.
Steptoe retrieved an egg from Lesley during a natural ovulatory cycle, without the hormone stimulation drugs used in modern IVF. Physiologist Robert Edwards then fertilized the egg in the lab using her husband’s sperm. The embryo was transferred back, and Lesley carried the pregnancy to 38 weeks and 5 days before delivering due to pre-eclampsia. Louise weighed 5 pounds, 12 ounces.
The birth triggered immediate global attention and controversy, but it also opened the door to modern fertility treatment. Two more IVF babies followed quickly: Courtney Cross was born on October 16, 1978, and Alastair MacDonald on January 14, 1979. Today, more than 10 million people have been born through IVF worldwide. Edwards received the Nobel Prize in Physiology or Medicine in 2010.
Synthetic Human Insulin
In 1978, researchers at Genentech, a young biotechnology company in San Francisco, produced the first recombinant DNA human insulin. David Goeddel and his colleagues inserted the genes for insulin’s two protein chains into E. coli bacteria, which then manufactured the hormone. Before this, people with diabetes relied on insulin extracted from pig or cow pancreases, which worked but occasionally caused allergic reactions and was expensive to produce at scale.
The Genentech achievement proved that living cells could be programmed to produce complex human proteins, a concept that launched the entire biotech pharmaceutical industry. By 1982, this synthetic insulin became the first genetically engineered drug approved for human use. The same basic approach now produces dozens of drugs, from growth hormone to clotting factors for hemophilia.
The First GPS Satellite
In February 1978, the U.S. military launched the first Block I Navstar GPS satellite into orbit, beginning what would eventually become the Global Positioning System. Three more satellites followed before the year was out. These early satellites were developmental, part of a testing program that ran from 1977 to 1979 with more than 700 tests confirming the system could accurately pinpoint locations on Earth using signals from space.
Additional demonstration satellites launched through the early 1980s, but the core concept was validated in 1978. The system was originally built for military navigation and weapons targeting. It wasn’t opened to civilian use until 1983, and full accuracy for non-military users didn’t arrive until 2000. Today, GPS underpins everything from smartphone maps to airline navigation to precision agriculture.
Pluto’s Largest Moon
In June 1978, astronomer James Christy at the U.S. Naval Observatory noticed something odd while examining photographic plates of Pluto. The planet appeared slightly elongated, as if something was orbiting close to it. Working with colleague Robert Harrington, Christy confirmed that Pluto had a large moon, which he named Charon after the mythological ferryman of the dead (and, by happy coincidence, a name that echoed his wife Charlene’s nickname, “Char”).
Charon turned out to be enormous relative to Pluto, roughly half its diameter. The discovery fundamentally changed how scientists understood the Pluto system and later contributed to the 2006 debate over whether Pluto should be reclassified. Some astronomers argued Pluto and Charon were better described as a double dwarf planet system than a planet with a moon.
The First Cellular Cancer Gene
Work published in 1978 and the years immediately surrounding it identified the first cancer-causing gene found in normal human cells. Researchers had known for decades that a virus called Rous sarcoma virus could cause tumors in chickens, and they had identified a specific gene in the virus, called src, responsible for triggering uncontrolled cell growth. The pivotal discovery was that a nearly identical version of this gene existed in healthy, non-infected cells across many species, including humans.
This meant cancer wasn’t solely caused by outside invaders like viruses. Normal cells carried genes that, when mutated or improperly activated, could drive tumor growth on their own. This concept, the proto-oncogene, became the foundation of modern cancer genetics and reshaped how researchers think about, diagnose, and treat cancer.
The Love Canal Environmental Disaster
On August 1, 1978, the New York Times ran a front-page story about a neighborhood in Niagara Falls, New York, built on top of a former chemical dump. The Hooker Chemical Company had buried roughly 21,000 tons of industrial waste in an abandoned canal during the 1940s and 1950s, then sold the land. A school and about 100 homes were built directly on the banks of the old canal.
By 1978, 82 different chemical compounds had been identified seeping up through the soil into basements and backyards, 11 of them suspected carcinogens. Benzene, a known cause of leukemia, was found in high concentrations. Residents reported unusually high rates of miscarriages, birth defects, and other health problems. By the end of August, 98 families had been evacuated and another 46 had found temporary housing. Eventually, 221 families were relocated from the most contaminated areas.
Love Canal became the defining environmental crisis of its era. It directly led to the creation of the federal Superfund program in 1980, which gave the government authority and funding to clean up hazardous waste sites across the country.
The U.S. Lead Paint Ban
In 1978, the federal government banned consumer uses of lead-based paint in the United States. Some states had already enacted their own bans earlier, but the federal rule established a nationwide standard. Lead paint had been widely used in homes for decades because of its durability and color retention, but mounting evidence showed that children who ingested paint chips or inhaled dust from deteriorating lead paint suffered serious neurological damage, including lower IQ, behavioral problems, and developmental delays.
The ban didn’t eliminate the problem. Any home built before 1978 may still contain lead paint beneath newer layers, and renovation or deterioration can release lead dust. This remains a significant public health concern: the EPA estimates that 24 million U.S. housing units still have deteriorated lead-based paint and elevated levels of lead-contaminated dust.
Naming the Legionnaires’ Disease Bacterium
A mysterious pneumonia outbreak at an American Legion convention in Philadelphia in 1976 killed 34 people and sickened more than 200. By 1977, CDC researcher Joseph McDade had isolated the responsible bacterium, but it didn’t fit neatly into any known bacterial family. In 1978 and early 1979, researchers formally proposed the name Legionella pneumophila and established an entirely new bacterial family, Legionellaceae, to classify it.
The identification explained not just the Philadelphia outbreak but also several earlier, unsolved clusters of pneumonia. The bacterium thrives in warm water systems like cooling towers, hot tubs, and large plumbing systems. Understanding its biology allowed public health officials to develop water management guidelines that have prevented countless outbreaks since.