Dartboards are made out of horsehairs.
129
A quarter has 119 grooves on its edge, a dime has one less groove!
34
Oak trees can live 200 or more years.
61
If you're one in a million, there are about 7,234 people just like you.
31
You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
19
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
People who laugh more are better able to tolerate pain - both physical and emotional.
36
You share your birthday with at least 9 million other people in the world.
205