Watch sparks and illusions with these mind-blowing science experiments! Watch as brilliant reactions create dazzling effects, from colorful sparks to optical illusions that defy reality.

Some remarkable optical illusions show that what we perceive does not directly correspond to reality; it is a subtle blend of the external world and the many lessons of our experience ...

The optical illusion seen above makes the viewer feel as if they are falling into an expanding hole – and now we have a good explanation for why this happens. Optical tricks can be caused by ...