Scientists in the UK are creating a smartphone app that will enable users to test for STDs.
0
A small airplane can fly backwards.
75
The first alarm clock could only ring at 4 a.m.
120
Jumbo jets use 4,000 gallons of fuel to take off.
19
Windmills always turn anti-clockwise. Except for the windmills in Ireland!
184
It takes six months to build a Rolls Royce...and 13 hours to build a Toyota.
93


