The cigarette lighter was invented before the match.
210
Energy is being wasted if a toaster is left plugged in after use.
21
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
Sony researchers have developed a refrigerator that only opens when you smile.
9
Whale oil was used in automobile transmissions as late as 1973.
56
A small airplane can fly backwards.
75