Our planet Earth is 4,600 million years old. If we reduce 【M1】______ this inconceivable time-span into an understandable concept, we can liken the Earth with a person of 46 years of age. Nothing 【M2】______ is known about the first 7 years of this persons' life, and whilst only scattered information exists about the middle span, we know that only at the age of 42 did the Earth begin to flower. Dinosaurs and the great reptiles did appear until one year 【M3】______ ago, when the planet was 45. Mammals arrived only 8 months ago; in the middle of last week man-like apes revolved into 【M4】______ ape-like men, and at the weekend the past ice age enveloped 【M5】______ the Earth. Modem man has been around for 4 hours. During the last hour Man discovered the agriculture. The industrial revolution began a minute early. During those sixty seconds of biological 【M6】______ time, Modem Man made a rubbish tip of the Paradise. He 【M7】______ has multiplied numbers to plague proportions, caused the 【M8】______ the extinction of 500 species of animals, ransacked the planet of fuels and now stands like a brutish infant, gloating 【M9】______ over his meteoric rise to ascendancy, on the near brink of a 【M10】______ war to end all wars and of effectively destroying this oasis of life in the solar system. 【M1】