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A drenched penguin waddling in bone-chilling air seems like a recipe for frozen feathers. Yet tiny grooves and an oily sheath on the feathers prevent some penguins from becoming popsicles, according to a detailed analysis of penguin plumage reported November 22 at the American Physical Society Division of Fluid Dynamics meeting in Boston. UCLA mechanical aerospace engineer Pirouz Kavehpour and colleagues observed gentoo penguin feathers under a scanning electron microscope and spotted a jagged surface full of nano-sized pores. The subtle roughness forces water droplets to slide off rather than stay and freeze. Preen oil released from a gland near the base of the tail also works as a water repellent. The Magellanic penguin, which lives in warmer climates than the gentoo, has no pores on its feathers and secretes a less-potent oil, the researchers say. Magazine In the Jan. 21 SN: Supercontinent superpuzzle, seeking better batteries, http://cheapjordansstock.com , real nausea in virtual reality, reversing premature aging, cheap Authentic jordans , pitcher plant ambush, quantum weirdness confirmed and more. Current Issue KEY INGREDIENTS Phosphorus and glycine, cheap jordans , both essential to life, have been found at comet 67P, seen in this March 29 picture from the Rosetta spacecraft. Rosetta/ESA, MPS, UPD, LAM, cheap wholesale jordans , IAA, SSO, cheap jordan shoes , INTA, cheap jordans free shipping , UPM, DASP, IDA SUPERFLARE Gusts of solar wind from the young sun produced life-supporting molecules, cheap jordans for sale , researchers propose. The solar flares probably compressed Earth’s magnetic field (blue lines) and sent particles raining into the atmosphere, as shown in this illustration. Tulsi Voralia/ THINKING OUTSIDE THE GOLDILOCKS ZONE The hunt for extraterrestrial life has long focused on planets at a just-right distance from alien stars, cheap real jordans , where liquid water can exist on a planet’s surface. Nicolle Rager Fuller | 202.785.2255 | http://ezyrecon.com/files/ http://www.evunplugged...er=228367&#Post228367 http://www.forumposter...c=11989.msg15126#msg15126 |