Life has existed on the earth for 3.8-40 billion years. Many species have appeared in the process, but 99.9999% of the species that have existed have been extinct... The tragedy of human existence is that we are still in a budding state. We are not only accelerating our own extinction, but 50 to 55 species are extinct because of us every year. The tragedy lies not in the imminent or potential crisis of human extinction, but in the mass extinctions we have caused.
View more about The 11th Hour reviews
