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POPSSpider builds life-sized decoys more: "We predicted that spiders with prey carcass decorations on webs should receive fewer wasp attacks because spiders should be well camouflaged by such objects," says Tso. "To our surprise, spiders on decorated webs received far more attacks than those on undecorated webs." That confirmed that the decorations attracted predators rather than acting as camouflage. However, Tseng and Tso suspected that these decorations might also redirect enough attacks to make them worthwhile.
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POPSRaindrops on roses The team tried to replicate the effect.They put some polyvinyl alcohol onto rose petals and allowed it to set, then peeled off a thin plastic cast of the petal surface.This film had the same properties as the rose petal:the film could hold droplets of between 3-5 microlitres even when held upside down. It seems that the physical shape of the surface is much more important than any chemical properties of the material in creating 'stickiness',says Ronald Fearing, a biomimetic engineer at the University of California at Berkeley. For a rose, this stickiness might come in handy as reflective water drops that glisten in the Sun might attract pollinating insects. In the lab, such materials might be useful for 'lab on a chip' devices that need to hold and shunt around tiny quantities of liquid without leaking or being contaminated by nearby materials. "These findings present many interesting applications in microfluid handling," says Fearing.
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POPSAwesome Free Vector Games You can download them all at source See also: Grid Wars Vector Tower Defense Mono Plasma Pong If you know some other free visually stunning vector games, feel free to share.
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POPSSome Zoo Creatures Curious about who lives at the Zoo? Find the facts about your favorite Zoo animal. A little something for kids of all ages
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