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  1. Desert beetle catches fog on its back

    The bumpy back of a desert beetle has inspired a design for collecting water from fog.

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  2. Math

    Online Bidding Tips

    The auction Web site known as eBay has become a vast marketplace, bringing together buyers and sellers of all sorts of goods. It has also become a handy laboratory for testing ideas in economics about markets and prices. In general, auctions ought to serve as an efficient mechanism for setting prices. Consequently, you would expect […]

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  3. Math

    Online Bidding Tips

    The auction Web site known as eBay has become a vast marketplace, bringing together buyers and sellers of all sorts of goods.