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Jets of Centaurus A

SPRING CLEANING  Jets erupting from a supermassive black hole, such as the one in Centaurus A (shown in this color composite image), might clear the way for supernovas to sweep out gas and stop star formation.

Chart of Nova Vul 1670

FOOLS THE EYE  The position of Nova Vul  (red circle) within the swan constellation was charted in the journal Philosophical Transactions in 1670.

Common coral trout

MOST WANTED  A common coral trout stalking a small fish dinner is one of several prized Plectropomus species responding well to Australia’s much-debated system of no-take reserves within Great Barrier Reef Marine Park.

A stone tool

TOOL TIMING  Hand axes, such as this Acheulean tool, were made as early as 1.7 million years ago. They probably had multiple uses, much like a Swiss army knife.

 Venable Ice Shelf

MELTDOWN   Antarctica’s Venable Ice Shelf, shown, is on track to disappear within a century, new research shows.



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