This popular YouTube video shows 10 amazing science-based tricks that will be the hit of any party. The tricks are presented by Professor Richard Wiseman of the University of Hertfordshire in the U.K. 

You can find more tricks by visiting Professor Wiseman’s daily blog.

In Professor Wiseman’s illusion pictured below, what looks like spirals of blue and green are actually the same color.  The overlay of orange or magenta stripes tricks are eyes into seeing different shades: