Benin History

 I wrote a brief history of Benin 

Mauritania History

 I wrote a little history of Mauritania 

History of Comets

 I wrote a brief history of comets. Human beings have observed them for thousands of years. 

History of Radio

 I wrote a brief history of radio 

History of Plastic

 I wrote a brief history of plastic. It's a modern material that has become vital to our daily lives. 

Mars History

 I wrote a little history of the planet Mars 

History of Asteroids

 I wrote a brief history of the asteroids, those small heavenly bodies between Jupiter and Mars.