By Clare Wilson
MEN who have children later in life may pass on changes acquired from their environment, a phenomenon reminiscent of Lamarckian evolution.
French naturalist Jean-Baptiste Lamarck thought that if organisms changed their bodies during their life to adapt to their environment, those changes could be passed to children. Giraffes stretching their necks to reach tall trees, and then passing longer necks on the next generation, is a classic example of this incorrect theory of evolution.
We now know organisms evolve through random DNA mutations: giraffes with …