The 80-second clip above captures a rocket launch, something of which we’ve all seen footage at one time or another. What makes its viewers call it “the greatest shot in television” still today, 45 years after it first aired, may take more than one viewing to notice. In it, science historian James Burke speaks about how “certain gases ignite, and that the thermos flask permits you to store vast quantities of those gases safely, in their frozen liquid form, until you want to ignite them.” Use a...