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simulation of lumpy universe

UNEVEN TERRAIN Universe simulations that consider general relativity (one shown) may shift knowledge of the cosmos.

colliding neutron stars

BANG, FLASH  Light waves and gravitational waves from a pair of colliding neutron stars reached Earth at almost the same time, ruling out theories about the universe based on predictions that the two kinds of waves might travel at different speeds. 

computer simulation of the universe

A TANGLED SKEIN  This computer simulation of the universe highlights its structure: long filaments of dark matter (blue) with galaxies strung along them like beads (pink). Most of the regular matter is probably stored in gas (orange).

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