Your skeleton keeps growing until you are about 35, then you start to shrink.
74
Brain scans show that people who view photos of a beloved experience an activation of the caudate - the part of the brain involving cravings.
103
We are born with 350 bones, and die with 206.
135
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
The average female will have 3.3 pregnancies in her life.
49
An average heart beats 100,000 times a day, pumping some 2,000 gallons of blood through its chambers. Over a 70-year life span, that adds up to more than 2.5 billion heartbeats.
73
A human brain produces as many as 12,000 to 50,000 thoughts per day, depending on how deep a thinker a person is.
23
Some people have a "natural alarm clock" allowing them to wake up when they want. This is actually caused by a burst of the stress hormone adrenocorticotropin.
15