Today, Alexander Grothendieck probably and hopefully celebrates his 80th birthday.
Congratulations to his cabin in the Pyrenees.
The romantic home doesn't prevent him from doing some great mathematics. For example, in Fall 2007, Chien-Hao Liu and Shing-Tung Yau clarified the new Polchinski-Grothendieck D-brane Ansatz on page 17 (19 of 59). ;-)
How did the Polchinski-Grothendieck collaboration work? Well, Grothendieck was having fun with his garden in the mountains while Joe listened to a Grothendieck-related talk and this is what he, not to be confused with Ginger, heard. :-)