Quote of the day
The sun was like a great visiting presence that stimulated and took its due from all animal energy. When it flung wide its cloak and stepped down over the edge of the fields at evening, it left behind it a spent and exhausted world.
Harold Jeffreys

Born: April 22, 1891
Died: March 18, 1989 (aged 97)
Bio: Sir Harold Jeffreys was an English mathematician, statistician, geophysicist, and astronomer. His book Theory of Probability, which first appeared in 1939, played an important role in the revival of the Bayesian view of probability.
Known for:
- Scientific inference (1931)
- Methods of Mathematical Physics (1946)
- Theory of probability (1939)
- The earth (1929)
- Cartesian tensors (1931)