Iron weighs more after it rusts.
16
A cesium atom in an atomic clock beats over nine billion times a second.
43
The average temperature at 40,000 feet above sea level is -60 F.
56
Sound travels about 4 times faster in water than in air.
408
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
If you blowtorch Pepto-Bismol, you would get a hunk of metal.
114