Gregory A. Wray, a professor of biology at Duke University who led the chimpanzee research, said What we used to think of as big, complex changes are in fact remarkably easy to achieve through changes in gene expression. This is changing the way that we think about evolution.
Marc Kirschner, a professor at Harvard Medical School, said We need to understand how you get the various kinds of novelty -- the first hand, the first eye, the first brain. It is the variety of life that needs explaining. Kirschner is also the co-author of a book, titled, The Plausibility of Life. This book looks at the biological sources of evolutionary change.
