For the first time in history, researchers have successfully transformed light into a Supersolid—a unique state of matter ...

There has been light from the beginning. There will be light, feebly, at the end. In all its forms—visible and invisible—it saturates the universe. Light is more than a little bit inscrutable.

A source of light makes light. The Sun and other stars, fires, torches and lamps all make their own light and so are examples of sources of light. Some animals, such as fireflies and glow-worms ...

Light pollution is the human-made alteration of outdoor light levels from those occurring naturally. Every light alters the night. Light pollution can negatively affect both humans and wildlife.