A new photo claiming to be a 1,000-foot-wide UFO near the Four Corners is sending the internet into a frenzy over whether ...

In Optica, researchers describe how they used a ruby crystal and specific laser wavelengths to show that a laser ... which acted as an object. The laser shadow effect is a consequence of optical ...

The Shadow Test is a horticulturist's trick that will help you work out the light levels in every room and ensure your ...

A shadow is a dark shape made when light is stopped or blocked by an object or a person. Some objects are opaque such as stone, metal and wood. This means light doesn't travel through them.

Social media users are weighing in on a photograph unveiled by the UAP Disclosure Fund, however it's been called out for ...