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Matter & Energy

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empty space

HEAT WAVE  Accelerating at a high rate could make empty space seem hot, according to an idea called the Unruh effect. Scientists may have spotted signs of an analogous phenomenon in ripples of water.

balls of nanoparticles

TO DYE FOR  By changing the spacing between nanoparticles aggregated into balls, researchers created these inks of five different colors.

sea slug

SLIMED  When startled, the dusky slug (Arion subfuscus) produces a goopy defense slime that slows down predators. Scientists are studying the chemical structure of this goo to make better surgical adhesives.

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