Tell me some cool facts about the human body

The human nose can detect over 1 trillion different scents.
The human brain is more active at night than during the day.
The human body has enough fat to make seven bars of soap.
The human eye can distinguish between approximately 10 million different colors.
The human tongue has around 10,000 taste buds.
The human heart beats around 100,000 times a day.
The human body produces enough saliva in a lifetime to fill two swimming pools.
The human skeleton is made up of 206 bones.
The human skin is the largest organ in the body.
The human body has enough iron to make a small nail