Bibliography:

• http://www.livescience.com, Life Science, 2013;
  
• http://www.bbc.co.uk
  
• http://people.chem.duke.edu;
  
• Genetec, The Discovery of Radioactivity, 2013
• Chemistry International, vol.33, no.1, Feb-Jan 2011
• http://www.nobelprize.org   

Image bibliography:

• www.allposters.com
• www.intellectualventueslab.com
• www.biblioabvazo.worldpress.com
• www.theodoregray.com
• www.nodeniteru.sourceforge.net
• www.mitpress.typepad.com

---