Quantum Physics

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strontium atomic clock

RIGHT ON TIME  A new atomic clock contains two ultrasensitive thermometers (center) that enable scientists to account for heat-caused fluctuations that limit the clock’s precision.

VACUUM ATTRACTION  Fleeting electromagnetic waves nudge parallel plates together through a phenomenon called the Casimir effect, illustrated here. If the same thing works with gravitational waves, it could prove the existence of particles that transmit gravity.

Calabi-Yau manifold

Calabi-Yau manifolds like this one represent extra dimensions tightly curled and wound up so they can't be detected. The question of how many dimensions of space there actually are is one of the top scientific mysteries for 21st century scientists to solve.

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