A cloud of ultracold atoms is like a motel with a neon “no vacancy” sign. If a guest at the motel wants to switch rooms, they’re out of luck. No vacant rooms means there’s no choice but to stay put.

Most of us have heard the weather proverb “red skies at night, sailors delight; red skies at morning, sailors take warning.” I certainly enjoy watching a beautiful red sunset, but for those of us in ...

Blue eyes have always caught attention, often seen as striking or mysterious, but the colour isn’t actually pigment at all.

Dynamic Light Scattering is commonly used to rapidly measure the hydrodynamic size and size dispersity of nanoparticles in suspension. Several commercial DLS instruments exist, using a range of ...

Blue eyes have very little melanin, so their colour comes not from pigment but from the scattering of light in the iris, a physical phenomenon called the Tyndall effect, similar to why the sky appears ...