Topic: Jack the Ripper

Man in tinfoil hat and tinfoil-lined bedroom (Getty Images/Matt Carr)

17 facts about conspiracy theories

Stacy Conradt - Mental Floss
(<a href='http://www.shutterstock.com/gallery-631318p1.html'>chrisdorney</a> via <a href='http://www.shutterstock.com/'>Shutterstock</a>)

The invention of modern murder

Lucy Worsley