One of the most revealing testimonies for a young Earth is a clock connected with the growth of Earth’s population down through time. If man has been on Earth for a million years, why is the population explosion only recently becoming a problem? In A.D. 1650 there were only 400 million people on the Earth. By the 1800s, the Earth’s population had risen to 850 million; and today there are more than 5 billion. (see fig. 69.) Does the present-day population correspond with the belief that man has