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19.03.2017, 11:09 - nieeshoes - Rank 6 - 1073 Posts
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. 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). 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). ![]() Turtle power Stepping forward Surprise absence cheap jordan shoes cheap Authentic jordans cheap wholesale jordans cheap jordans for sale cheap jordans online cheap real jordans cheap jordans free shipping cheap retro jordans http://www.garteninsel...ion=com_content&id=56 http://www13.plala.or....ite_roots/gwbbs/gwbbs.cgi http://www.regards-publicite.com/ |