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Some of our finest [ about ] Approved Articles Developed Articles (over 700) Article of the Week [ about ] (PD) Image: Ernst Haeckel Buzz of Life: One aspect of the interrelations among living entities. Researchers begin to understand the mechanisms governing the complex network interactions between plants and pollinators, such as hummingbirds, shown in this illustration from Ernst Haeckel's Kunstformen der Natur (1904). The definition of life, the determination of the fundamental nature of living things, and the explanation of life's origin and evolution, have engendered much thought, debate and research throughout history. The perspective on life at any given moment in history, even today, qualifies as realistic and fruitful only to the extent of human knowledge at the time. In this article we focus defining the activity of living. We focus on what essential activities living entities perform that enable their living — specifically, we focus on the fundamental processes of living, those that constitute the system that counts as a living thing, the "common denominator that allows for the discrimination of the living from the non-living". [more...] New Draft of the Week [ about ] © Photo: ledzeppelin.com (l. to r.) Jimmy Page, John Bonham, Robert Plant, and John Paul Jones, c 1975. Led Zeppelin were a highly rated British blues-rock outfit and statistically regarded as one of the most successful rock bands of the seventies. They first formed in 1968 from the remaining members of The Yardbirds, and consisted of Jimmy Page (b. 1946, guitar), Robert Plant (b. 1948, vocals), John Paul Jones (b. 1946, bass guitar / keyboards), and John Bonham (1948-1980, drums). They are considered one of the most influential bands in the world, becoming closely associated with the "album-oriented rock" (AOR) format and progenitors of a style of rock music called "heavy metal", although the band's musical output transcended heaviness with a strong blues, folk, psychedelia, classical, Celtic, and world music flavour in their recordings, and acoustic live performances. The band also eschewed traditional promotional avenues in the industry, focussing on albums and concerts, without reliance on singles or television performances. The interaction of all four musicians on stage gave their live performances a visual counterpoint to voluminous intertwined harmonic and rhythmic structures of their compositions. [more...]