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.
Howcheng/Wikimedia Commons (CC0 1.0)
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.
Kristen Brown/ARC Centre of Excellence for Coral Reef Studies
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.
NASA Earth observatory, joshua stevens, Landsat data, USGS