Not swinging your arms when you walk increases the effort of walking by 12%, the equivalent of walking 20% faster or carrying a 10 kg backpack.
12
The WD in WD-40 stands for Water Displacer.
30
Coins usually survive in circulation for about 30 years.
66
It's impossible to sink in the Dead Sea without equipment!
72
In the White House, there are 13,092 knives, forks and spoons!
51
Anuptaphobia is the fear of staying single.
11