You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
The WD in WD-40 stands for Water Displacer.
30
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 streets of Victor, Colorado, once a gold rush town, are paved with low-grade gold.
78
It's impossible to kill yourself by holding your breath.
703
The majority of suicides occur on a Monday.
393
