Human history is full of inventions. It starts back from the Dark Age, where humans first learned how to make fire and then they started to make instruments to make their daily tasks easier such as hunting. Inventing new instruments and machines have changed the lifestyle of human beings. This section is full of those inventions, which really changed our history.
Did you know? Inventor of the upside-down ketchup bottle earned around 13 million dollars from his invention.
Did you know? Inventor of the chocolate chip Ruth Wakefield sold his idea for a lifetime supply of the chocolate.
Did you know? Inventor of the petroleum jelly Robert Chasebrough, ate a spoonful of it every day because he believed it has a lot of health benefits. He died at the age of 96 years.