1826 - John Walker, an Englishman from Stockton-on-Tees, invented the first practical friction match,
1834 - The electric motor was invented by Thomas Davenport. Davenport secured US patent No. 132 on 25 Feb 1837 for his direct current motor. He combined the concept of the electromagnet with commutator and brushes to control the direction of current flow to produce rotary motion.
2001, sodium was detected in the atmosphere of an extrasolar planet by the Hubble Space Telescope.
1701 - Anders Celsius
Anders Cesius proposed the centigrade temperature scale that set 0° at the point where water boils and 100° at the point where water freezes. 'Centigrade' refers to the Latin word for '100 steps'. Carolus Linnaeus reversed the endpoints and called the scale Celsius.
1874 - Chaim Azriel Weizmann
Weizmann was a Russian chemist who developed the method to produce acetone using bacteria and fermentation during World War I. Subsequently, he modified his technique to produce other organic compounds using bacteria during fermentation. He served as the first President of Israel.
Report published in Astrophysical Journal, on 27 November 2011
Scientists discovered an planet in another solar system (exoplanet) Gliese 581g that has hospitable environment for life.
Royal Society Event at London on 27 November 2012 - 6.30 pm to 7.30 pm
Newton and the Origin of Civilization
Based on Isaac Newton's Chronology of Ancient Kingdoms Amended, published in 1728, one year after the great man's death.
Recorded video will be available on this page a few days after the event.
US has the highest Cyber Monday Sales
Nearly $1.5 billion - 20% more than last year.
New Scientist 27 November 2012
Knowledge History of the Day - Index for the Year
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