Within a single generation (between 1810 and 1840) more progress was made in every branch of science than in all the hundreds of thousands of years that had passed since man first looked at the stars and wondered why they were there. It must have been a very sad age for the people who had been educated under the old system. And we can understand their feeling of hatred for such men as Lamarck and Darwin, who did not exactly tell them that they were "descended from monkeys," (an accusation which our grandfathers seemed to regard as a personal insult,) but who suggested that the proud human race had evolved from a long series of ancestors who could trace the family-tree back to the little jelly-fishes who were the first inhabitants of our planet.