A car operates at maximum economy, gas-wise, at speeds between 25 and 35 miles per hour.
-4
Technically speaking, crystal glass is actually a Liquid that flows very slowly.
43
Students at MIT developed a wristband that can regulate your “thermal comfort”, which could possibly eliminate the need for central heating and cooling.
17
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12
A small airplane can fly backwards.
75
First four countries to have television: England, the U.S., the U.S.S.R., and Brazil.
47