Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47
The ball on top of a flagpole is called a 'truck'.
24
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Castor oil is used as a lubricant in jet planes.
-5
A small airplane can fly backwards.
75
