You can hear the blood flowing through your ears if you find a quiet place and cover them tightly.
17
There's 100 trillion good bacteria living in your body.
17
Gin is a mild diuretic which helps the body get rid of excessive fluid. Thus, it can reduce problems such as menstrual bloating.
90
Coughing can cause air to move through your windpipe faster than the speed of sound - over a thousand feet per second!
197
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
A human being loses an average of 40 to 100 strands of hair a day.
133
There are times when you're walking that the pressure on your feet exceeds your body weight, and when you're running, it can be three or four times your weight.
62