Whale oil was used in automobile transmissions as late as 1973.
56
There are only 14 blimps in the world.
69
The normal static electricty shock that zaps your finger when you touch a doorknob is usually between 10,000 and 30,000 volts!
60
It would take twenty new mid-size cars to generate the same amount of pollution that a mid-size 1960's car did.
20
Energy is being wasted if a toaster is left plugged in after use.
21
There's a Mumbai-based pizzeria that now delivers pizza by drone.
4
More than a billion transistors are manufactured every second.
-25
Castor oil is used as a lubricant in jet planes.
-5