Chipping has been unable to attend first-day assembly.Chips - and you""ll allow me to refer to him as ""Chips,"" seeing that hirty-seven years ago this autumn, he gave me a thrashing for sheer-bone laziness.This was not he first time the subject matter was performed.The screenplay by Howard Koch was based on W.Somerset Maugham""s mid-1920s London stage play (that featured Gladys Cooper in the lead role).Then, it was a Broadway play that opened in 1927 (with Katharine Cornell), followed by Paramount Studios"" talkie of the same name in 1929 with Academy-Award nominated Jeanne Eagels (in her sound film debut) as the female protagonist Leslie Crosbie.To restore the original Hill Valley to its better state, "Doc" and Marty had to travel back to the year 1955 to the time of Marty""s and "Doc""s" previous visit (in the first film) - November 12, 1955 - the date that older Biff gave his younger counterpart the almanac, and prevent the incident from happening.In the Visitor""s Center, Hammond showed off an educational, animated film which described how the genetically-cloned dinosaurs were created from their DNA found in the blood of mosquitos hat had been preserved in amber 100 million years ago - "fossilized ree sap".