This blue-glowing water is being spun around by nothing but sound waves. Reaching speeds up to 6,000 RPM, this centrifuge forms the basis for a new type of inexpensive, point-of-care biomedical test.

Eerie fluorescent blue patches of water glimmering off Hong Kong’s seashore are magnificent, disturbing and potentially toxic, marine biologists say. The glow is an indicator of a harmful algal ...

said the ­eutrophication — which occurs when water becomes over-rich in plant nutrient — is so bad that the lagoon would appear as “glowing blue/green” from space. Study authors conducted ...