Massive blooms of Sargassum seaweed that have inundated coastlines across the Atlantic since 2011 likely originate off the coast of West Africa—forming years before they are visible and overturning long-standing assumptions about where these events begin.

Assisted evolution could help corals survive future heatwaves, but careful trait choice and strong repeated selection will be needed for it to be effective.

A recent study published in National Science Review finds abundant ocean eddies in the Antarctic marginal seas, using unprecedented high-resolution satellite altimetry (SWOT). The observed spatial distribution of these eddies, combined with numerical simulations, suggests that ice shelf basal melting and dense shelf water formation are key processes driving the widespread eddy activity. This discovery unveils Antarctic mesoscale ocean processes for the first time, which improves our ability to predict future climate and sea-level change.