Lynn Margulis, Acclaimed Biologist and Critic of Neo-Darwinism, RIP

“No evidence in the vast literature of heredity changes shows unambigious evidence that random mutation itself, even with geographical isolation of populations, leads to speciation. Then how do new species come into being? How do cauliflowers descend from tiny, wild Mediterranean cabbagelike plants, or pigs from wild boars?”

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.)