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19.03.2017, 11:54 - anyoshoes - Rank 6 - 1072 Posts
Turtle power Stepping forward A gut microbe collected from chinchilla droppings appears to have no mitochondria, making it the first known complex life without the supposedly universal organelle (SN: 6/11/16, p. 14). ![]() Studies of prototurtle fossils suggest that, instead of serving as natural armor, turtle shells might have got their start by aiding in burrowing (SN: 8/6/16, p. 15). The idea could help explain how turtle ancestors survived a mass extinction 252 million years ago. Surprise absence Small tweaks to a gene that makes a protein important for skeletal development may have led to the big toe and helped shape the human foot for bipedalism (SN: 2/6/16, p. 15). Scientists pinned down the genetic changes that, in a famous example of natural selection, made peppered moths soot-colored (SN: 6/25/16, p. 6). cheap real jordans cheap Authentic jordans cheap jordans cheap jordans online cheap wholesale jordans cheap jordans free shipping cheap jordans for sale cheap jordan shoes http://www.midwestartfairs.com/node/add/article http://www.verteidiger...rum_topic&topic=14895 http://www13.plala.or....ite_roots/gwbbs/gwbbs.cgi |