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Latest PNAS Stories

2012-10-09 10:36:04

By the time our children reach kindergarten their learning and developmental patterns are already taking shape, as is a trajectory for their future health. Now, for the first time, scientists have amassed a large collection of research that looks "under the skin", to examine how and why experiences interact with biology starting before birth to affect a life course. Biological Embedding of Early Social Adversity: From Fruit Flies to Kindergartners, a special volume published in the...

2009-12-17 14:11:31

PNAS study documents puzzling movement of electricity-producing bacteria near energy sources. Bacteria dance the electric slide, officially named electrokinesis by the USC geobiologists who discovered the phenomenon. Their study, published online Dec. 15 in PNAS Early Edition, describes what appears to be an entirely new bacterial behavior. The metal-metabolizing Shewanella oneidensis microbe does not just cling to metal in its environment, as previously thought. Instead, it harvests...


Word of the Day
attercop
  • A spider.
  • Figuratively, a peevish, testy, ill-natured person.
'Attercop' comes from the Old English 'atorcoppe,' where 'atter' means 'poison, venom' and‎ 'cop' means 'spider.' 'Coppa' is a derivative of 'cop,' top, summit, round head, or 'copp,' cup, vessel, which refers to 'the supposed venomous properties of spiders,' says the OED. 'Copp' is still found in the word 'cobweb.'
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