The average tastebud lives only 10 days before it dies and is replaced by a new one.
15
Men have larger hearts; women's hearts beat faster.
77
Falling in love raises levels of nerve growth in a person's brain for about a year and can improve their memory.
39
Your thumb is about the same size as your nose.
124
Staying awake for 17 hours is the same for your body as drinking 2 glasses of wine.
193
Enamel is hardest substance in the human body.
61
There are 206 bones in the human body!
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