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Earth is under siege from outer space! In a way.

(PhysOrg.com) -- They shrink when you heat 'em. Most materials expand when heated, but a few contract. Now engineers at the California Institute of Technology (Caltech) have figured out how one of these curious materials, scandium trifluoride (ScF3), does the trick—a finding, they say, that will lead to a deeper understanding of all kinds of materials.

It's near the end of Steve Cohen's chamber magic show , and he reaches for his legendary teakettle. Yeah--here it comes.