Colour isn't just a physical property; it's how our brains interpret light reflected from objects. Different creatures ...

Discover why the sky is blue and the sunset is red. When sunlight travels through the atmosphere ... Fill the container with water. Place the light source so the beam shines through the container.

You may have grown up hearing the saying “red sky at night, sailor’s delight, red sky in morning, sailor’s warning” - or maybe a variation of it. CrowdScience listener Alison, who sees ...