1.
An acrobat called "The Human Fly" entertained people by balancing precariously on the edge of buildings.
2.
And an ostrich farm became one of the most popular tourist attractions in the US.
6.
A wife took her husband to court for refusing to wash.
9.
Dutch exotic dancer Mata Hari was convicted of being a German spy, and executed by firing squad.
12.
British soldiers set off one of the biggest non-nuclear blasts in modern history, killing 10,000 German soldiers.
14.
Army officers attempted to listen out for incoming enemy planes using massive ear trumpets like this.
15.
The German army trained pigeons to carry cameras.