# Harold Urey

> American physical chemist (1893-1981)

**Wikidata**: [Q179777](https://www.wikidata.org/wiki/Q179777)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Harold_Urey)  
**Source**: https://4ort.xyz/entity/harold-urey

## Summary

Harold Urey was born on April 29, 1893, in Walkerton[1][2][3][4][5][6][7][8][9][10][11], and died on January 5, 1981, in La Jolla[1][2][3][4][5][7][8][10][12]. He was subsequently buried at Fairfield Cemetery[4]. He was married to Frieda Urey from 1926 until 1981, and they had a child named Elizabeth Baranger.Working across the fields of physical chemistry and physics, Urey was an astronomer, chemist, physical chemist, physicist, university teacher, and writer[13]. His academic career included serving as an employer or faculty member at the University of Chicago, the University of Copenhagen, Johns Hopkins University, and Columbia University.Throughout his career, he received numerous accolades, including the Nobel Prize in Chemistry, the Franklin Medal, the Medal for Merit, the J. Lawrence Smith Medal, the Gold Medal of the Royal Astronomical Society, and the Priestley Medal, among two additional awards[14][15][16][17][18].

## Summary
Harold Urey was an American physical chemist and astronomer known for his pioneering work in isotope chemistry and nuclear physics. He won the Nobel Prize in Chemistry in 1934 for discovering deuterium, a heavy isotope of hydrogen, and later contributed to the Miller–Urey experiment, which explored the origins of life. His research spanned planetary science, geochemistry, and cosmology, leaving a lasting impact on multiple scientific disciplines.

## Biography
- Born: April 29, 1893, in Walkerton, Indiana, United States
- Nationality: American
- Education: Ph.D. in Chemistry from the University of California, Berkeley
- Known for: Discovery of deuterium, contributions to isotope chemistry, and the Miller–Urey experiment
- Employer(s): University of Chicago, Columbia University, University of California, San Diego, Johns Hopkins University, University of Copenhagen
- Field(s): Physical chemistry, nuclear chemistry, planetary science, geochemistry

## Contributions
- **Discovery of Deuterium (1931):** Urey isolated deuterium, a stable isotope of hydrogen, which earned him the Nobel Prize in Chemistry in 1934. This discovery was foundational for nuclear physics and isotope research.
- **Miller–Urey Experiment (1953):** Collaborated with Stanley Miller to simulate early Earth conditions, demonstrating how organic compounds could form from inorganic substances, a landmark in origin-of-life studies.
- **Planetary Science:** Contributed to the understanding of planetary atmospheres and the formation of the solar system, influencing NASA’s early space exploration programs.
- **Geochemistry:** Advanced the study of isotopic compositions in meteorites and lunar samples, aiding in the development of geochemical dating techniques.
- **Publications:** Authored numerous influential papers and books, including *The Planets: Their Origin and Development* (1952), which synthesized planetary science research.

## FAQs
### What did Harold Urey discover?
Harold Urey discovered deuterium, a heavy isotope of hydrogen, in 1931. This breakthrough was critical for nuclear physics and earned him the Nobel Prize in Chemistry in 1934.

### What was the Miller–Urey experiment?
The Miller–Urey experiment, conducted in 1953, simulated the conditions of early Earth to test how organic compounds could form from inorganic substances. It provided key insights into the chemical origins of life.

### Where did Harold Urey work?
Urey held academic positions at several prestigious institutions, including the University of Chicago, Columbia University, the University of California, San Diego, Johns Hopkins University, and the University of Copenhagen.

### What awards did Harold Urey receive?
Urey received numerous accolades, including the Nobel Prize in Chemistry (1934), the Franklin Medal, the National Medal of Science, and the Gold Medal of the Royal Astronomical Society.

### How did Harold Urey influence planetary science?
Urey’s work on isotopic compositions and planetary atmospheres helped shape early NASA missions and the study of meteorites and lunar samples, advancing the field of planetary geochemistry.

## Why They Matter
Harold Urey’s discovery of deuterium revolutionized nuclear physics and isotope chemistry, laying the groundwork for modern nuclear science. His collaboration on the Miller–Urey experiment provided foundational evidence for the chemical origins of life, influencing astrobiology and evolutionary science. Urey’s contributions to planetary science and geochemistry also played a crucial role in early space exploration, particularly in analyzing extraterrestrial materials. His interdisciplinary approach bridged chemistry, physics, and astronomy, leaving a legacy that continues to inspire research in multiple scientific fields.

## Notable For
- Nobel Prize in Chemistry (1934) for discovering deuterium.
- Co-developer of the Miller–Urey experiment, a landmark study in origin-of-life research.
- Pioneering work in isotope chemistry and nuclear physics.
- Contributions to planetary science, including studies of meteorites and lunar samples.
- Author of *The Planets: Their Origin and Development* (1952).
- Recipient of the Franklin Medal, National Medal of Science, and Gold Medal of the Royal Astronomical Society.
- Member of the National Academy of Sciences and the Royal Society.
- Namesake of the Urey lunar crater and the Harold C. Urey Prize in planetary science.

## Body
### Early Life and Education
Harold Clayton Urey was born on April 29, 1893, in Walkerton, Indiana. He earned his Ph.D. in Chemistry from the University of California, Berkeley, where he began his research in physical chemistry.

### Discovery of Deuterium
In 1931, Urey isolated deuterium, a heavy isotope of hydrogen, by fractionally distilling liquid hydrogen. This discovery was pivotal for nuclear physics and earned him the Nobel Prize in Chemistry in 1934.

### Miller–Urey Experiment
In 1953, Urey collaborated with Stanley Miller to conduct the Miller–Urey experiment, which simulated early Earth conditions to demonstrate how organic compounds could form from inorganic substances. This experiment became a cornerstone in origin-of-life research.

### Academic Career
Urey held faculty positions at several institutions, including the University of Chicago, Columbia University, and the University of California, San Diego. He also worked at Johns Hopkins University and the University of Copenhagen, contributing to research in nuclear chemistry and planetary science.

### Planetary Science and Geochemistry
Urey’s work extended to planetary science, where he studied isotopic compositions in meteorites and lunar samples. His research helped develop geochemical dating techniques and influenced early NASA missions.

### Awards and Honors
Urey received numerous awards, including the Nobel Prize in Chemistry (1934), the Franklin Medal, the National Medal of Science, and the Gold Medal of the Royal Astronomical Society. He was also a member of the National Academy of Sciences and the Royal Society.

### Legacy
Urey’s contributions to isotope chemistry, nuclear physics, and planetary science left a lasting impact on multiple scientific disciplines. His work continues to inspire research in astrobiology, geochemistry, and space exploration. The Urey lunar crater and the Harold C. Urey Prize in planetary science are named in his honor.

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