Tenzing Norgay, mentioned in many places in the film, was the first Sherpa to climb Mount Everest. He accompanied and led the legendary explorer Edmund Hillary to conquer Mount Everest.
The beep of Herb's medical equipment comes directly from the radar sound effect in 21: A Space Odyssey.
The book that Marilyn read was Jon Krakauer's Walking into the Thin Air Zone.
The suit that George Clooney wore in the film was made according to that of gary grant in Indiscreet》(1958).