These porous sheets, which together form a coarse white powder, vastly outperformed sheets that did not have the pores, and commercially available chunks of boron nitride that is not made up of the tiny sheets.

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She also melted chocolate with porcini powder and streamed ribbons of the mixture into cold water to form thin branches.

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Italian pasta and Indian rice are sold alongside milk powder from Dubai and reminders of recent aid dependency in the form of cooking oil from the World Food Programme.

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When the rover zapped the powder with its laser, it turned out to be gypsum, a mineral that tends to form in bodies of water.

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There's good reason to rush: The white powder is an experimental drug called Glivec, and it may be the most potent weapon ever aimed at a common form of leukemia.

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But if you heat up the alloy until it liquefies--Branagan's powder must be heated to 1, 200 degrees Celsius and applied with a thermal spray gun--it turns into an ashy powder as it cools, a metallic glass with "frustrated" molecules, as Branagan calls them, anxious to form a lattice, but confined by their inability to move.

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