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
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
Castor oil is used as a lubricant in jet planes.
-5
The IRS processes more than 2 billion pieces of paper each year.
28
Scientists in China have built a prototype high-speed maglev train that is theoretically capable of reaching speeds of up to 1,800 mph (2,900 km/h).
1
