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 Venable Ice Shelf

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

Pangaea supercontinent

BREAKUP  The narrowing of the Tethys Ocean between early Eurasia and Africa tore apart the ancient Pangaea supercontinent, illustrated here during its fragmentation 150 million years ago, new research suggests.

lightning volcano

FIRE BOLT  Lightning that crackles through volcanic ash plumes, such as during this 2010 eruption of Eyjafjallajökull in Iceland, can kiln microscopic glass orbs, new research finds.

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