We may have a mental block when it comes to complex problems like math, puzzles and memory, but when it comes to telling your brain not to think about something, that itself is impossible.

So why is that? According to New Scientist, it has to do with what our thoughts are made out of. Because our brain is a factory of electric static, it's hard to tell what's going on on the inside, but the thought of not thinking about "anything" or "something" makes that thought physically appear in your brain.

Don't believe us? Try it now. 

[New Scientist]