Instead of sulfur dioxide, the University of Washington researchers are using specially designed nozzles to spray misted seawater containing tiny particles of sea salt over the deck of the Hornet.

The Great Barrier Reef is one of the great wonders of the natural world, but it's in danger. Over the last few weeks - and for the third time in five years - it has suffered a mass bleaching event.

Evidently spooked by prominent media reports, the Alameda City Council has now asked the researchers to halt their experiments. "City staff are working with a team of biological and hazardous ...