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.

Shining light on a water droplet creates effects analogous to what happens in an atom. This can help us understand how atoms work, write researchers. Shining light on a water droplet creates effects ...