A stereogram optical illusion is a fascinating visual puzzle that hides a 3D image within a 2D pattern. At first glance, it appears to be a random collection of repeating designs or colourful dots.

There's an easy way to make 3D work for people who can't see it. But no one is doing it. Rafe Needleman reviews mobile apps and products for fun, and picks startups apart when he gets bored. He has ...

When the first 3-D movies started hitting the theaters, I was excited to take my kids to see them. I realized early on, though, that I was not enjoying 3-D — I just got headaches. So I spoke to Dr.