Life's blueprint - in a letterTo play this audio please enable JavaScript, and consider upgrading to a web browser that supports HTML5 videoAshley Byrne04/06/2013April 6, 2013When Francis Crick and James Watson discovered the double-helix model of DNA structure in 1953, Crick wrote about it in a letter to his 12 year old son. The letter is up for auction this week.https://p.dw.com/p/18AiNAdvertisement Report: Ashley Byrne