Why are most animal signals reliable? This is the central problem for evolutionary biologists interested in signals. A number of theoretical answers have been proposed and empirical studies made, but a considerable amount of confusion still remains. The authors, one a theoretician the other a fieldw[...]

All living plants and animals, including man, are the modified descendants of one or a few simple living things. A hundred years ago Darwin and Wallace in their theory of natural selection, or the survival of the fittest, explained how evolution could have happened in terms of processes known to tak[...]