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green sea turtle

TURTLE TROUBLE  Green sea turtle populations in parts of the Great Barrier Reef are becoming increasingly female because their eggs are being incubated at higher temperatures due to warming ocean waters. 

coral reef

COLORLESS  Bleaching removes the algae that feed corals and give them their color, turning vibrant reefs barren. Reefs are now experiencing severe bleaching much more frequently than four decades ago.

Larsen C ice shelf break

WIDENING GULF   A Delaware-sized iceberg calved when a crack in the Larsen C ice shelf reached the Weddell Sea this year. In this satellite image from September, rifts are visible in the ice and clouds cast a shadow on the new iceberg.

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