A UK judge ruled that a photograph inspired by another photograph, but clearly different from it, infringes the original photo's copyright. The two photographs were shot in the same location, have the same subject, and use the same distinctive post-processing treatment. However, the angle and composition are different. From the article: '[The judge] said a difficult decision hinged on a "qualitative assessment of the reproduced elements." He defined Fielder's image a "photographic work," as distinct from a simply a photograph, in that "its appearance is the product of deliberate choices and also deliberate manipulations by the author," and concluded that those aspects had been copied

http://www.dpreview.com/news/2012/01/25/Imitated_Image_Copyright_Case

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Polyphasic sleep, a term coined by early 20th-century psychologist J.S. Szymanski,[1] refers to the practice of sleeping multiple times in a 24-hour period—usually more than two, in contrast to biphasic sleep (twice per day) or monophasic sleep (once per day). It does not imply any particular sleep schedule. The circadian rhythm disorder known as irregular sleep-wake syndrome is an example of polyphasic sleep in humans. Polyphasic sleep is common in many animals, and is believed to be the ancestral sleep state.[2] The term polyphasic sleep is also used by an online community that experiments with alternative sleeping schedules to achieve more time awake each day.