What are your ideas for how this bird is able to balance?

This circular rainbow was generated by light from the morning sun coming through a peephole in a door. Why do you think this happened?...

Why do objects that are hot glow red, then objects that are even hotter glow white? Why do you think that happens?

It's hard to tell in this picture, but this flame appears black because it is a sodium flame under sodium light!

This is called "total internal reflection." This occurs when light is traveling and encounters a boundary, and instead of traveling...