Out of all the senses, smell is most closely linked to memory.
146
No matter how cold it gets, gasoline will not freeze.
107
The weight of a carat (200 milligrams), standard unit of measurement for gemstones, is based on the weight of the carob seed.
51
Sound travels about 4 times faster in water than in air.
408
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Scientists aren't sure what color dinosaurs were.
312
