Darmstadt, Germany, 7 September 1829
Bonn, German Empire, 13 July 1896
chemist
August Kekulé
August Kekulé
Darmstadt, Germany, 7 September 1829
Bonn, German Empire, 13 July 1896
chemist
August Kekulé
Kekulé structure of benzene with alternating double bonds
Darmstadt, Germany, 7 September 1829
Bonn, German Empire, 13 July 1896
chemist
August Kekulé
Kekulé's benzene ring in modern form, and the alchemical ouroboros symbol of a snake eating its tail
Darmstadt, Germany, 7 September 1829
Bonn, German Empire, 13 July 1896
chemist
August Kekulé
1964 West German centenary stamp for the discovery of the molecular formula of benzene
Mount Pleasant, Iowa, September 7, 1914
Iowa City, August 9, 2006
space scientist
James Van Allen
James Van Allen
Mount Pleasant, Iowa, September 7, 1914
Iowa City, August 9, 2006
space scientist
James Van Allen
James Van Allen of the University of Iowa poses in workshop with a rocket and scientific instrument package (Rockoon)
Mount Pleasant, Iowa, September 7, 1914
Iowa City, August 9, 2006
space scientist
James Van Allen
Pickering, Van Allen, and Von Braun IGY News Conference at National Academy of Sciences in Washington, D.C.
Mount Pleasant, Iowa, September 7, 1914
Iowa City, August 9, 2006
space scientist
James Van Allen
Model of Van Allen Radiation Belts
