If two pieces of metal touch in space, they become permanently stuck together.
807
It's possible to die from a broken heart; it's called Stress Cardiomyopathy.
165
Service dogs are trained to know when they are on duty. When their harness is on, they know they are at work. When you take it off they instantly become playful and energetic.
11
People who laugh more are better able to tolerate pain - both physical and emotional.
36
The exact cause of death and burial site of Genghis Khan is unknown, because all of the 2000 funeral guests and 800 soldiers were killed in order to preserve the secret.
16
No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
154