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Matter & Energy

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general relativity

FLYING COLORS  Einstein’s theory of gravity has passed another test, based on the galaxy ESO 325-G004 (bright spot at center right). The experiment is the most precise check of general relativity on a galactic scale.

an illustration of a Dyson sphere

STAR CATCHER  To prepare for an eventual energy shortage caused by the accelerating expansion of the universe, an ultrapowerful alien civilization could gather stars and capture their energy using hypothetical structures known as Dyson spheres, illustrated above.

LHC

LEVEL UP  Scientists are developing equipment to upgrade the Large Hadron Collider (shown). The first stage of construction for the upgrade began June 15.

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