A squad of graduate students aboard the icebreaker Araon is getting a crash course in the slow and physical work of ocean exploration.

Decades of overfishing and habitat degradation led to huge declines in freshwater biodiversity in China's longest river, but there are signs of recovery after a fishing ban was implemented in 2021.

Sempra, the California utility, is promoting one of the major new terminals for liquefied natural gas on the shore of a UNESCO World Heritage Site.

Coral reefs, worth an estimated $9.8 trillion a year to humanity, are in far worse shape than previously realized. A massive international study found that during the 2014–2017 global marine heatwave, more than half of the world’s reefs suffered significant bleaching, and many experienced large-scale coral death.