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Earth & Environment

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aerial view of Trichodesmium microbes

SEA CHANGE  A rethink of earlier studies suggests trouble ahead for a major player in ocean nutrient cycles, the nitrogen-fixing Trichodesmium microbes, which can grow in abundance as seen is this image (pale streaks).

Scott Jasechko

DEEP WATER  Deep groundwater wells, such as this hand-pumped well in Uganda being operated by water resources scientist Scott Jasechko, can contain mixes of old and young water and traces of pollution.

map of Earth

FULL OF PLATES  Earth’s outer crust is composed of more than a dozen large pieces, known as tectonic plates, which bump or slide against each other.

Earth & Environment

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