What is a cognitive bias? It’s a preconceived opinion you form about other people and things. It is not based on an objective analysis, and you form it for no real reason except what you happen to ...

Add Yahoo as a preferred source to see more of our stories on Google. Test how well you remember the past. Is it the Berenstein Bears or the Berenstain Bears? Does Curious George have a tail or not?

For example, some argue that the Mandela Effect provides evidence for multiple universes. Some physicists, drawing on theories such as string theory, argue that there are infinite possible universes.

Add Yahoo as a preferred source to see more of our stories on Google. Broome has said that she "loves" the idea that the Mandela Effect, or others claiming they distinctly recall different events or ...