At 10, he solved complex math problems. Unlocked the atom's true power. But his 3-word question about aliens changed how scientists see the universe

Looking at the night sky can raise a simple but difficult question: if the universe is so large, why have we not found anyone else living in it? There are billions of stars in the Milky Way alone, and many of them have planets. Yet, despite decades of searching, humans have still not found clear evidence of an intelligent alien civilisation.

That question is closely linked to one physicist who changed nuclear science and, almost at the same time, left behind a question that continues to puzzle scientists. His name was Enrico Fermi.

A maths prodigy who moved quickly through physics

According to the Nobel Prize, Fermi was born in Rome on September 29, 1901. His ability in mathematics and physics was noticed when he was still a child. By the age of 10, he was spending his free time working through geometry problems and building electric motors.


The death of his brother in 1915 also pushed the young Fermi deeper into books. He turned to subjects including trigonometry, physics and theoretical mechanics.

In 1918, he entered the Scuola Normale Superiore of Pisa. His entrance essay reportedly dealt with a partial differential equation relating to a vibrating rod and was considered to be at a doctoral level. He earned his physics degree in 1922, at just 21.

His career soon moved into major areas of modern physics. In 1926, he developed the statistical laws now known as Fermi statistics. Later, his research turned towards the atomic nucleus.

His experiments helped open the nuclear age

Fermi's work with neutrons became one of his most important contributions. In 1934, he showed that bombarding elements with neutrons could produce nuclear transformations and helped discover the importance of slow neutrons.

His research earned him the 1938 Nobel Prize in Physics for his demonstrations involving new radioactive elements produced through neutron irradiation and related nuclear reactions involving slow neutrons, according to the Nobel Prize.

That same year, Fermi left Italy and moved to the United States with his family, partly because of the country's fascist government and anti-Semitic laws.

His work later became central to the development of nuclear technology. At the University of Chicago, he led the construction of Chicago Pile-1, the first controlled, self-sustaining nuclear chain reaction. It went critical on December 2, 1942.

Fermi later became part of the Manhattan Project. The Nuclear Museum notes that he also worked at Los Alamos and played an important role in nuclear research during the Second World War.

Then came one question about aliens

Fermi's scientific interests were not limited to what happened inside an atom. In 1950, during a lunchtime discussion with fellow physicists about extraterrestrial life and interstellar travel, he reportedly asked a question that was short enough to become famous:

“Where is everybody?”

The question became the basis of what is now called the Fermi paradox.

The basic problem is straightforward. The Milky Way is extremely old and contains an enormous number of stars. If even a small number of planets produced intelligent civilisations, some of those civilisations could have had millions or billions of years to develop technology and spread through space.

Yet there is no confirmed evidence that any such civilisation has contacted Earth.

Scientists still have no clear answer

Several explanations have been proposed. Advanced civilisations may be extremely rare, interstellar travel may be far harder than expected, or intelligent life may disappear before it becomes capable of communicating across space.

Another idea is the Great Filter, a stage in the development of life that most civilisations fail to pass. If that barrier is behind humanity, our emergence could be exceptionally rare. If it is still ahead, humans may eventually face the same problem.

The Drake equation, developed by astronomer Frank Drake in 1961, later gave scientists a mathematical way to think about how many communicating civilisations might exist in the Milky Way.

But there is still no definite number, and no confirmed alien signal.

Fermi died in Chicago in 1954, but his work continues to influence nuclear physics. His seemingly simple question has also taken on a life of its own. More than seven decades later, “Where is everybody?” remains one of the biggest unanswered questions about our place in the universe.