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United States Postal Services 2011 Issue
Designed by Greg Berger, Bethesda, MD

American Scientists

The United States Postal Service has issued four new stamps that have the forever postage value for 1st class named "American Scientists" on the 16th of June 2011. This four stamp set is the third in the series that honor American scientists who have made extraordinary contribution to the advancement of science. Each scientist is listed below with a small explanation of their discovery.

  • Melvin Calvin - advanced our understanding of photosynthesis and conducted pioneering research on using plants as an alternative energy source. He won the Nobel Prize in chemistry in 1961.
  • Asa Gray - a botanist who advanced the specialized field of plant geography.
  • Maria Goeppert Mayer - developed a theoretical model that helped explain the structure of the atomic nucleus. She won the Nobel Prize in Physics.
  • Severo Ochoa - a biochemist who synthesize ribonucleic acid and competed in the race to decipher the genetic code. He won the Nobel Prize in medicine in 1959.

"American Scientists" stamps can be purchased as a set of 4, Pane of 20, or FDC's. The size of the stamp is 39.62mm x 24.89mm and the size of the pane is 183.39mm x 149.76mm. They were printed by Banknote Corporation of America using the offset printing process with microprint "USPS". A total of 30 million stamps will be printed.

American Scientists FDC's

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