How It's Made simplify overdubbing in different languages. For example, the show currently avoids showing a narrator or onscreen host, does not often have employees of featured companies speak on camera, and keeps human interaction with the manufacturing process to a bare minimum. An off-screen narrator explains each process, often with humorous puns. Each half-hour show usually has three or four main segments, with each product getting a demonstration of approximately five minutes; exceptions are allowed in the allotted time for more complex products. Usually, every show has at least one product with a historic background note preceding it, showing how and where
Whiskers and a dark plume which swoops forward from the top of its head. Whiskered auklets sent through a maze of tunnels with their feathers taped back bumped their heads more than twice as often as they did when their feathers were free, indicating they use their feathers in a similar way to cats. Other birds that have obvious "whiskers" are flycatchers, swallows, nightjars, whip-poor-wills, the kakapo and the long-whiskered owlet ("Xenoglaux loweryi"). Some fish have slender, pendulous tactile organs near the mouth. These are often referred to as "whiskers", although they are more correctly termed barbels. Fish that have barbels