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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.

a painted lady butterfly (Vanessa cardui) resting on vegetation

GOING THE DISTANCE  Painted ladies travel 12,000 km each year, farther than any known butterfly migration.

Koko the gorilla

R.I.P.  Koko, seen here showing Francine Patterson a flower, gained fame for learning sign language. The western lowland gorilla died June 19 at age 46.

brain scan of cerebral atrophy

A VIRAL LINK? A brain showing cerebral atrophy, a loss of nerve cells, one of the main signs of Alzheimer’s disease.



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