Darwin’s other big idea (in addition to the theory of evolution by natural selection) was sexual selection. “We are, however, here concerned only with that kind of selection, which I have called sexual selection. This depends on the advantage which certain individuals have over other individuals of the same sex and species, in exclusive relation…
What is a face? It is our identity; what we present to the world and where we express our emotions. Do insects have faces? I think most people would agree that they do, even if they are not the flexible mirrors of the soul that faces are in humans (and other mammals). We humans have…
Why is that in some butterflies, the sexes are identical, whereas in other species the male and female are very different? Not an easy question to answer I think. In many of our common species, like the Red Admiral or the Peacock (below), the sexes are very similar, although the female may be slightly larger.…
Ray Cannon's nature notes 