Fascinating Inventions You Never Knew Existed

Piano Doorbell

This piano doorbell will have all of your visitors annoying you! Some might play a soft melody while others will key smash to let you know of their arrival. Either way, it's a fun way to bring in visitors and provides a little laugh at the door.

The More You Know

Hippos have the largest mouths of any animal on land.
The people who are currently alive are only 7% of the total number of people who have ever lived.
Peanuts can be used to make dynamite.
The word "kimono" means "a thing to wear."

Post originally appeared on Upbeat News.