Grenades were invented in China over 1,000 years ago.
50
France’s King Louis XIV was offered biological weapons by an Italian chemist. He not only refused, but also paid the chemist an annual salary to never reveal the technology to anyone else.
21
The oldest stone tools found are dated from 2.7 - 2.9 million years ago. The species that made these tools is unknown.
13
The last time American Green cards were actually green was 1964.
60
The Titanic was the first ship to use the SOS signal.
149
Vikings used the skulls of their enemies as drinking vessels.
169
