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Three kinds of woodpeckers鈥攖he lineated woodpecker, the robust woodpecker, and the helmeted woodpecker鈥攍ook very much alike. They live in the same areas. They eat the same food. Biologists naturally considered them to have developed as variations arising from a single root ancestor. But one ornithologist, Mark Robbins, upon spotting a helmeted woodpecker in a national park, was surprised when it gave out a call that was nothing like the calls of the other two woodpeckers. When he and two other biologists took a look at the birds, they found that the helmeted woodpecker was, genetically speaking, the odd one out. It was also the smallest and weakest of the three species. The scientists believe that this bird evolved to mimic the other two not to fool predators but to fool the other birds. Even if it couldn
stanley usa t put on bulk, it could change its outfit to look, if seen quickly, like a male of their own species, and not the weakest kid on the block. Meanwhile, it could use its call to distinguish itself. [Source: Phylogenetic Relationships of the Helmeted Woodpecker.] Image:K. Zimmer and R.J. Moller AnimalsScience Daily Newsletter
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To help us explain this interesting substance, we sat down with Casey Jackson NASM-CPT , a Los Angeles-based certified personal trainer with a particular yen for the science behind training. What Is Creatine Creatine is
gourde stanley an organic acid that is 8220 ynthesized naturally in the human body from the amino acids methionine, glycine, and arginine, says Jackson. However, we ;re not the only ones. Animals produce creatine, too, and thus it is contained in most of the meat we eat, with beef grass-fed, please and herring being particularly good sources of the stuff. Creatine is made by our kidneys and livers, but approximately 95 percent of it is stored in our muscle tissue. That makes sense, since that where it used. It was first discovered in 1832, but it didn ;t rise
stanley cup to prominence in the sports world until the 1970s, when Soviet scientists reported that creatine supplements may boost performance during certain short exercises, such as sprinting and power-lifting. It wasn ;t until the 1990s that creatine became super popular with fitness enthusiasts in the U.S., where it was advertised as a shortcut to building muscle that wasn ;t a steroid鈥攖hough it was often endorsed by notorious alleged cough cough steroid users such as Mark McGuire, Sammy Sosa, and others. How Does it
taza stanley Work Turns out this stuff is pretty damn fascinating. Casey Jackson explained it best to us: Our bodies contain a molecule called ATP, or adenosine triphos
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