In 1971, the singer-songwriter John Denver famously claimed that sunshine on his shoulders made him happy. Researchers have put this idea to the test many times since, and found that it is basically true.
Danny Boyle's Failed Sci-Fi Experiment Almost Inspired A Trilogy
"Originally, when we were doing it, Alex wrote two other parts," Boyle explained, discussing plans for Sunshine that never materialized due to the film's poor box office performance.