Date in year · 1940 · The 1940s
February 27, 1940
On February 27, 1940, martin Kamen and Sam Ruben discover carbon-14. Susan Howatch, Willie John McBride, Tom Jones would arrive in the same year.
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Featured · February 27, 1940
Martin Kamen and Sam Ruben discover carbon-14.
Martin David Kamen was an American chemist who, together with Sam Ruben, co-discovered the synthesis of the isotope carbon-14 on February 27, 1940, at the University of California Radiation Laboratory, Berkeley. He also confirmed that all of the oxygen released in photosynthesis comes from water, not carbon dioxide, in 1941.
Around 1940
The year in brief
1940 (MCMXL) was a leap year starting on Monday of the Gregorian calendar, the 1940th year of the Common Era (CE) and Anno Domini (AD) designations, the 940th year of the 2nd millennium, the 40th year of the 20th century, and the 1st year of the 1940s decade.
What happened
On February 27, 1940
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1940 Martin Kamen and Sam Ruben discover carbon-14. American chemist (1913–2002)
Martin David Kamen was an American chemist who, together with Sam Ruben, co-discovered the synthesis of the isotope carbon-14 on February 27, 1940, at the University of California Radiation Laboratory, Berkeley. He also confirmed that all of the oxygen released in photosynthesis comes from water, not carbon dioxide, in 1941.
Elsewhere that year
Other moments from 1940
- April 14 World War II: Royal Marines land in Namsos, Norway, preceding a larger force which will arrive two days later.
- April 23 The Rhythm Club fire at a dance hall in Natchez, Mississippi, kills 198 people.
- April 7 Booker T. Washington becomes the first African American to be depicted on a United States postage stamp.
- April 8 The Central Committee of the Mongolian People's Revolutionary Party elects Yumjaagiin Tsedenbal as General Secretary, marking the beginning of his 44-year-long tenure as de facto leader of Mongolia.
- April 9 World War II: Operation Weserübung: Germany invades Denmark and Norway.
- April 9 Vidkun Quisling seizes power in Norway.
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