Resolved Question

Maybe not ANNUAL, but populations of various animals/insects follow "non-linear" differential equations so that once it awhile the numbers just increase all out of expectation. There was a show on a periodic "plague of rats" in a Southeast Asia country that turns out coincide with the fruiting of bamboo trees [which don't fruit every year] so that when a bumper crop of bamboo fruit grew, the rats that fed off them exploded eery whatever yearsand then devoured domestic crops when the bamboo was ********. People during Biblical times didn't have the benefit of modern mathematics to understand the Universe. Remember the solar eclipse panics before they were understood in the Middle Ages?