the cycle of the zodiac is 24 thousand years, which means man, would have to follow the starts for 24k/yrs. to know that its a cycle and not a continues event you need another cycle, 48k. i would argue

technology has increased populations. plumping being one of the largest. feeding yourself in the past on the whole hasnt be that hard. you plant food and hunt but its not as easy as driving to the supermarket.