biography
| name: |
Jeffreys, Sir Harold
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| sex:
| male
|
| lived:
| (1891–1989)
|
| biography:
| Geophysicist, astronomer, and mathematician, born in Fatfield, Tyne and Wear, NE England, UK. He studied at Cambridge, where he became reader in geophysics (1931–46) and professor of astronomy (1945–58). In a wide-ranging scientific career, he investigated the effect of radioactivity on the cooling of the Earth, and postulated that the Earth's core is liquid. He studied earthquakes and monsoons, made a fresh estimate of the age of the Solar System, and re-calculated the surface temperatures of the outer planets. In mathematics he made contributions to probability theory and operational calculus. |
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