1.A mans testicles manufacture 10 million new sperm cells each day: enough that he could repopulate the entire planet in only 6 months!
2.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 50 miles every day.
2.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 50 miles every day.