Albert Einstein — Theoretical Physicist and Nobel Laureate

Albert Einstein was born on March 14, 1879, in Ulm, in the Kingdom of Württemberg of the German Empire, to secular Ashkenazi Jewish parents Hermann Einstein, a salesman and engineer, and Pauline Koch. Shortly after his birth, the family moved to Munich, where his father and uncle founded an electrical engineering company. As a young child, Einstein was slow to learn to speak, leading his parents to worry he might have a learning disability.

Einstein attended St. Peter's Catholic elementary school in Munich from age five and was later transferred to the Luitpold Gymnasium, where he received advanced primary and secondary education. He excelled in mathematics and physics from an early age, teaching himself algebra, calculus, and Euclidean geometry when he was twelve. In 1894, his family's business failed and they moved to Italy, leaving Einstein behind in Munich to finish his schooling, but he soon left the Gymnasium to join them in Pavia.

Location: Munich, German Empire

At age sixteen, Einstein sat the entrance examination for the Swiss Federal Polytechnic School (ETH) in Zurich but failed the general portion. On the principal's advice, he completed his secondary education at the Argovian Cantonal School in Aarau, Switzerland, graduating in 1896 with top marks. Later that year, he renounced his German citizenship to avoid military conscription and enrolled in the four-year mathematics and physics teaching diploma program at ETH Zurich, where he befriended Marcel Grossmann and met his future wife, Mileva Marić.

Location: Aarau and Zurich, Switzerland

Einstein graduated from ETH Zurich in 1900, receiving his diploma as a teacher of mathematics and physics. Unable to find a teaching position, he worked as a tutor and substitute teacher. In February 1901, he acquired Swiss citizenship, and the Swiss authorities deemed him medically unfit for military service. With the help of Marcel Grossmann's father, he eventually secured a position as a technical assistant at the Swiss Patent Office in Bern.

Location: Zurich, Switzerland

In 1902, Einstein began working as a patent examiner (assistant examiner — level III) at the Swiss Patent Office in Bern, where he evaluated patent applications including ideas for a gravel sorter and an electric typewriter. His employers made his position permanent in 1903. During his spare time at the patent office, Einstein produced much of his most remarkable work, with his thought experiments about signal transmission and clock synchronization directly informing his development of the special theory of relativity.

Location: Bern, Switzerland

Einstein married Mileva Marić, his former classmate from ETH Zurich, in January 1903. The couple had a daughter named Lieserl in early 1902 whose fate remains uncertain, followed by son Hans Albert in May 1904. Einstein and Marić had shared a deep intellectual partnership, and historians continue to debate the extent of her contributions to his early work. The marriage later deteriorated, and they divorced in 1919, with Einstein agreeing to give Marić his future Nobel Prize money as part of the settlement.

Location: Bern, Switzerland

In 1905, often called Einstein's Annus Mirabilis (miracle year), he published four groundbreaking papers in the journal Annalen der Physik. In March, he proposed the light quantum (photon) theory explaining the photoelectric effect. In May, he provided a theoretical explanation of Brownian motion, confirming the atomic theory of matter. In June, he introduced the special theory of relativity, reconciling Maxwell's equations with mechanics. In September, he derived the mass-energy equivalence formula E=mc². These works fundamentally transformed modern physics.

Location: Bern, Switzerland

On April 30, 1905, Einstein completed his Ph.D. dissertation titled 'A New Determination of Molecular Dimensions' at the University of Zurich under Professor Alfred Kleiner. The 24-page paper, dedicated to his friend Marcel Grossmann, addressed a topic in molecular physics and was approved three months later. Einstein was formally awarded his Ph.D. on January 15, 1906, marking the culmination of his formal academic training alongside his revolutionary independent work.

Location: Zurich, Switzerland

Einstein's academic career advanced rapidly after 1908, when he became a Privatdozent at the University of Bern. In 1909, he was appointed Associate Professor at the University of Zurich, followed by a full professorship at the German University in Prague in 1911. He returned to ETH Zurich as a professor in 1912. In 1914, he joined the Prussian Academy of Sciences in Berlin as a professor at Humboldt University and director of the Kaiser Wilhelm Institute for Physics, a position that allowed him to focus entirely on research.

Location: Bern, Zurich, Prague, and Berlin

After eight years of intense work, Einstein presented the final field equations of general relativity to the Prussian Academy of Sciences in Berlin on November 25, 1915. The theory reimagined gravitation as the curvature of four-dimensional spacetime caused by mass and energy, replacing Newton's law of universal gravitation. In 1916, he published a comprehensive paper applying the theory to cosmology, introducing the cosmological constant and laying the foundation for modern theoretical cosmology.

Location: Berlin, German Empire

On May 29, 1919, a total solar eclipse allowed Sir Arthur Eddington's expedition to test Einstein's prediction that gravity bends light. Observations from Príncipe, West Africa, and Sobral, Brazil, confirmed that starlight passing near the Sun was deflected by an amount consistent with Einstein's calculations rather than Newton's. The results were announced on November 6, 1919, at a joint meeting of the Royal Society and Royal Astronomical Society in London. The news made Einstein a global celebrity, with newspaper headlines announcing 'Revolution in Science — Newtonian Ideas Overthrown.'

Location: Príncipe, Portuguese West Africa / London, England

Einstein was awarded the 1921 Nobel Prize in Physics in 1922 'for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect.' His work on relativity remained controversial among some Nobel committee members, so the prize explicitly cited his photoelectric effect research rather than relativity. Unable to attend the ceremony due to his tour of Asia, Einstein's Nobel lecture was delivered by a German diplomat. True to his divorce settlement, he transferred the prize money to his former wife Mileva Marić.

Location: Stockholm, Sweden

In February 1933, while visiting the United States, Einstein learned that Adolf Hitler had become Chancellor of Germany. He knew he could not return as a Jewish academic under the Nazi regime. Nazi authorities raided his Berlin apartment, confiscated his sailboat, and his works were burned in Nazi book burnings. Einstein formally renounced his German citizenship in March 1933 and began a period of exile, first staying in Belgium and England with police protection. On October 17, 1933, he arrived in the United States to take up a position at the newly founded Institute for Advanced Study in Princeton, New Jersey.

Location: Princeton, New Jersey, United States

Einstein became one of the first scholars at the Institute for Advanced Study in Princeton, New Jersey, where he remained until his death in 1955. He lived at 112 Mercer Street from 1935 onward. During his Princeton years, he pursued a unified field theory to unify gravity and electromagnetism, and famously debated quantum mechanics with Niels Bohr, declaring that 'God does not play dice.' He formed a close friendship with mathematician Kurt Gödel, with whom he took daily walks. He became a U.S. citizen in 1940 while retaining his Swiss citizenship.

Location: Princeton, New Jersey, United States

In July 1939, physicist Leó Szilárd visited Einstein at his summer home on Nassau Point, New York, to warn him about the possibility that Nazi Germany might develop atomic bombs. Einstein, a lifelong pacifist, agreed to sign a letter to President Franklin D. Roosevelt urging the United States to begin its own nuclear research. Dated August 2, 1939, the letter helped prompt the creation of the Manhattan Project. Einstein later called signing the letter 'one great mistake in my life,' though he acknowledged the justification of the threat posed by Nazi Germany.

Location: Nassau Point, New York / Princeton, New Jersey, United States

After World War II, Einstein became a leading voice for nuclear disarmament, world government, and civil rights. He joined the NAACP, campaigned against racism (which he called America's 'worst disease'), and corresponded with W. E. B. Du Bois. In 1946, he was awarded an honorary degree from Lincoln University, a historically black college. He advocated for a democratic world government to prevent nuclear war and was offered the presidency of Israel in 1952, which he respectfully declined. In July 1955, the Russell-Einstein Manifesto was released, warning of the dangers of nuclear weapons.

Location: Princeton, New Jersey, United States

Albert Einstein died on April 18, 1955, at Princeton Hospital at the age of 76 from an abdominal aortic aneurysm. He had worked on a speech for Israel's seventh anniversary just days before his death. In accordance with his wishes, his body was cremated the same day. His brain was removed during autopsy without prior permission and preserved for scientific study. Einstein left his personal archives, library, and intellectual assets to the Hebrew University of Jerusalem. Time magazine named him Person of the Century in 1999, cementing his legacy as one of history's greatest scientific minds.

Location: Princeton, New Jersey, United States