A humble man in tireless pursuit: Shu Chien, a 2010 national medal of science awardee.

On his 70th birthday, Shu Chien's colleagues put together a 600-page book of letters, essays, and photographs as a tribute not only to his contributions to the field of bioengineering but also in honor of his character as a valued friend, research collaborator, and family member. Perhaps they thought that the book would commemorate the moment when Chien began to consider retirement. But in the last decade, he has added more than 140 publications to an already impressive list of 379. And he shows no sign of slowing down.