Editing 1929 in science (section)

==Biology==
* [[C. B. van Niel]] makes the first announcement of his discovery that [[photosynthesis]] is a [[light-dependent reaction|light-dependent]] [[redox]] reaction.<ref>{{cite journal|url=http://books.nap.edu/html/biomems/cvanviel.pdf |first1=H. A. |last1=Barker |first2=Robert E. |last2=Hungate |title=Cornelius Bernardus van Niel, 1897-1985: a biographical memoir |journal=Biographical Memoirs of the National Academy of Sciences |year=1990 |pages=395–7 |accessdate=10 June 2011 |archiveurl=https://web.archive.org/web/20110607024721/http://books.nap.edu/html/biomems/cvanviel.pdf |archivedate=7 June 2011 |url-status=live }}</ref>
* Professor Frederick Gericke of the [[University of California, Los Angeles]], demonstrates that [[plant]]s can be grown soil-free all the way to maturity, the basis of [[hydroponics]].