It's a paradox. It goes against what our logical mind expects. The funny thing is, even when we understand the mathematics, it's still hard to believe.

Also, The 'Ben Franklin Effect' - Do people REALLY like you more AFTER they have done a favour for you?

“Image(s) and/or video used under licence from shutterstock.com”

Some images used are in the public domain.

The animated video depicting the brain connections is used under enhanced licence from shutterstock.com

Head icon by Saravanakumar Kandasami (changed from black to white). This is shown incorrectly on-screen as 'Greg Hartley'. This is an error and is corrected here in the description of the video.

Thank you SOOOO much to all followers of 'Very Nearly Interesting' who kindly responded to the birthday survey used in this video.