There's a light that never goes out… well, almost never. Since the invention of commercial light bulbs in the late 19th century, one bulb has outshone all others. In 2025, it could enter its 124th ...

This twisted wire illustrates how the filament in the Edison bulb is twisted, but at a micro-scale – when the light's wavelength matches the length of the twist, the lightwaves twirl as they go ...