Evolving Metamorphosis: A Hopeless Task

Your job is to explain insect metamorphosis in evolutionary terms. What will you say? We can learn from the example of two geneticists who basically said the process is “evolutionarily conserved” — that is, not evolved!

Pumice and the Origin of Life

Pumice stone has other uses including the preparation of stonewashed denim. (You may find bits of it in the pockets of your newly purchased “distressed” jeans.)