Humans are the largest pest ever seen on Earth. How do we think (we must do something) after terrible mass extinctions, trilobites, dinosaurs(are we the next dinosaurs?) we are almost "to blame" when knowing the Earth's permanent recycling but still continue to use up resources (like buring the dead) or petrol or coal, it will one day end, it has been speeded up by humans, we think there has been life on Mars, we still say it is us, we use resources, (we may not replace them), the Earth life will end... But a meteorite could end with the dinosaurs life (or the trilobites)?