Norman Rufus Colin Cohn FBA (12 January 1915 31 July 2007) was a British academic, historian and writer who spent 14 years as a professorial fellow and as Astor Wolfson Professor at the University of Sussex.

The three Ahn sisters breathe new life into the piano trio with their passionate musicmaking. At TEDWomen, they start with the bright and poppy Skylife, by David Balakrishnan, then play a gorgeous, slinky version of Oblivion, by Astor Piazzolla.