Earth & Environment

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balloons

HEFTY HELIUM  A reservoir of more than a trillion liters of helium gas are stashed away beneath Tanzania, enough to fulfill global helium demand for everything from party balloons to MRI machines for years.

coral in American Samoa

WHITE FRIGHT  Warming ocean temperatures threaten reefs around the globe, like this one in American Samoa; the prolonged heat can lead to coral bleaching. 

hydrothermal vents

SMOKE IN THE WATER  Ecosystem-supporting hydrothermal vents in the deep ocean are much more common than previously thought, new research shows.

Earth & Environment

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