Listen 13’39 : https://youtu.be/tELZEPcgKkE

In 1997, Scottish scientists revealed they had cloned a sheep and named her Dolly, sending waves of future shock around the world that continue to shape frontiers of science today.

http://www.dnaftb.org/19/animation.html

http://dosequis.colorado.edu/Courses/MethodsLogic/papers/WatsonCrick1953.pdf