Try making a 3-D hand drawing. It’s easier than you think and requires no special artistic skills.

Optical illusions are fun ways of tricking the brain. Some of them cause us to perceive movement when their is none, others cause us to see something as being far larger or smaller than it really is, ...

For millennia, when children traced their hands on paper the end result was always the same: a Thanksgiving turkey. Now we are on the brink of a revolution. Today, we have learned how to draw our ...