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Earth & Environment

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New Delhi

SILENT KILLER  Pollution, especially dirty air such as seen here in New Delhi, is linked to roughly one-sixth of the world’s premature deaths, a new study finds.

Mt. Etna

ETNA ERUPTS  This Italian volcano (shown here in 2013) erupted in 44 B.C., likely reducing monsoon rains that fed into the Nile River and ultimately fueling civic unrest in Ptolemaic Egypt.

sea slugs

HITCHHIKERS  These marine sea slugs stowed away on a derelict vessel from Iwate Prefecture in Japan before being washed ashore in Oregon in April 2015. 

Earth & Environment

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