Life in a Day (2011 film) part of the "elite" and to show the intricacy and strangeness of the seemingly mundane." Macdonald began his "Around the world in 80,000 clips" article in "The Guardian" by posing the questions, ""What do you love? What do you fear? What's in your pocket?"" and explaining that "one day last summer, I asked ordinary people around the world to answer those three questions and spend a day filming their lives." The 80,000 individual clips received amounted to 4,500 hours of electronic footage. Macdonald explained that about 75% of the film's content came from people contacted through YouTube, traditional advertising, TV
Life expectancy the data required are easily identified in the case of humans, the computation of life expectancy of industrial products and wild animals involves more indirect techniques. The life expectancy and demography of wild animals are often estimated by capturing, marking, and recapturing them. The life of a product, more often termed shelf life, is also computed using similar methods. In the case of long-lived components, such as those used in critical applications: in aircraft, methods like accelerated aging are used to model the life expectancy of a component. The age-specific death rates are calculated separately for separate groups of data