Your stomach gets a new lining every 3 to 4 days.

Humans share about 60% of their DNA with bananas.

The human brain contains around 86 billion neurons.

Your bones are stronger than steel but much lighter.

The tongue is the only muscle attached at one end.

Your body has about 5 million hairs.

Smiling can boost your immune system.

Blood makes up about 8% of your body weight.

The strongest muscle in your body is your masseter (jaw muscle).

Your eyes can distinguish about 10 million different colors.