There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
Whale oil was used in automobile transmissions as late as 1973.
56
A small airplane can fly backwards.
75
Sony researchers have developed a refrigerator that only opens when you smile.
9
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
Jumbo jets use 4,000 gallons of fuel to take off.
19
There are only 14 blimps in the world.
69
Contrary to popular belief, putting sugar in a car's gas tank will NOT ruin its engine.
25