Two Americans and a Dane win chemistry Nobel | AFP

The Nobel Chemistry Prize is awarded to a trio of chemists for laying the foundation for a more functional form of chemistry. Americans Carolyn Bertozzi and Barry Sharpless, together with Denmark's Morten Meldal are honoured for "for the development of click chemistry and bioorthogonal chemistry". The award marks the second Nobel for 81-year-old Sharpless, who won the chemistry Nobel in 2001. SOUNDBITE
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