Corrected entry: When Lisa crosses over to the boys side of the school, she looks in the window of the math class where the teacher asks the class the volume of a three circled snowman with a carrot nose. Lisa corrects Martin's answer by saying, "He forgot the volume of the carrot nose. One-third base times height!" This is incorrect, the volume of a cone (the shape of a carrot) is one-third pi radius squared times height. Or if she was going for the area instead, that is one-half the base time height. Lisa always prides herself on being incredibly smart, so she should not have made this mistake, especially when she was so confident.
Question: Homer travels back in time and causes changes by what he does in the past, like stepping on a bug. I once saw a movie with the same basic plot: some people travel back in time and are told to be careful not to disturb anything, but when they return to their time everything has changed. In the end they discover it was because they stepped on a butterfly. Does anyone know the name of this movie?
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