How Human Extinction Would Change The Earth

  Those carnivores will include human pets, more likely cats than dogs. “I think that wolves are going to be very successful and they’re going to outcompete the hell out of dogs,” Weisman says.“Cats are a very successful non-native species all over the world. Everywhere they go they thrive.”The question of whether ‘intelligent’ life could evolve again is harder to answer. One theory holds that intelligence evolved because it helped our early ancestors survive environmental shocks. Another is that intelligence helps individuals to survive and reproduce in large social groups.