Optical illusion puzzles have been there for centuries and these are fun challenges that are designed to play tricks on our eyes and brains. Optical illusions work on a simple principle where it ...

To check your cognitive skill and IQ level, there are many ways, but among these, brain teasers are the best and fun game to test your logical and thinking skills with your observation level. These ...

Lucia Suarez Sang is an associate managing editor at CBSNews.com. Previously, Lucia was the director of digital content at FOX61 News in Connecticut and has previously written for outlets including ...