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icosahedron

HYDROGEN HUDDLE  Scientists produced negatively charged clusters of hydrogen in the lab. Hydrogen molecules made up of two hydrogen atoms (pairs of silver spheres) surround a negatively charged hydrogen ion (red sphere). The molecules arrange into an icosahedron, a shape with 12 vertices.

Timey wimey

TIME MACHINE  The TARDIS, disguised as a police phone box, is the time machine used by Doctor Who, one of many examples of fictional time travelers described by James Gleick in his book Time Travel.

ALPHA-2 experiment

ANTIMATTER MATCH  Scientists with the ALPHA-2 experiment, shown above, found that antimatter and matter versions of hydrogen behave alike. The frequency of light necessary to boost antihydrogen atoms into a higher energy state is the same as that for normal hydrogen atoms.

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