Castor oil is used as a lubricant in jet planes.
-5
UFO sightings have reduced by over 80% since the introduction of smartphones and public access to HD video.
2
The first alarm clock could only ring at 4 a.m.
120
Thomas Alva Edison patented almost 1,300 inventions in his lifetime!
144
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4