Enamel is hardest substance in the human body.
61
Your thumb is about the same size as your nose.
124
It takes twice as long to lose new muscle if you stop working out than it did to gain it.
127
When you are looking at someone you love, your pupils dilate, they do the same when you are looking at someone you hate.
1k
There are about 255 babies born worldwide every minute.
46
Having sex can make a woman look younger and more attractive due to the release of estrogen and collagen.
346
We share 70% of our DNA with a slug.
218
It took 200,000 years for humans to reach 3 billion in number. It took 40 years for the next 3 billion.
11