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world map of submarine fiber-optic cables

MOTION OF THE OCEAN FLOOR  The network of submarine fiber-optic cables that deliver work emails and cat videos to computers around the world could double as undersea earthquake detectors. Existing cables are shown in purple; planned cables are in blue.

Antarctic iceberg

MELTDOWN  An iceberg floats near the Rothera Research Station on the Antarctic Peninsula. Melting ice from the Antarctic ice sheet, which includes the peninsula, has intensified, new research finds.

Fuego volcano

DANGER ZONE  Guatemala’s Fuego volcano erupted on June 3, sending flows of superheated rock and gas down its slopes. At least 69 people have been reported dead from the eruption. An analysis of  fatalities shows how volcanoes have killed people since 1500.

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