The WD in WD-40 stands for Water Displacer.
30
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
Studies show that the colder the room you sleep in, the more likely you are to have a bad dream.
29
The harder you concentrate on falling asleep, the less likely you are to fall asleep.
34
You can tape a small mirror onto a cone speaker, play music and shine a laser on to the mirror and the reflection will look like a laser light show on your wall.
102
If you counted 24 hours a day, it would take 31,688 years to reach one trillion!
44
Diamonds mined in Brazil are harder than those found in Africa.
40
