Sept. 29 (UPI) -- Friday's Google Doodle celebrates Mihály Csíkszentmihályi, the Hungarian-American psychologist who studied the science of happiness, on his 89th birthday.
Csíkszentmihályi, who first tried to understand healing and joy after witnessing the horrors of World War II, is depicted in the artwork as exhaling and watching his breath cycle through the pastel-colored letters of the word "Google."