A flamingo that never learned to stand on one leg, that spent most of its time in the water with both legs immersed, would lose somewhere around 40-70% more body heat than a flamingo that did learn this behavior.
The ideas of the Enlightenment played a major role in inspiring the French Revolution, which began in 1789. After the Revolution, the Enlightenment was followed by an opposing intellectual movement known as Romanticism.
Central to Enlightenment thought were the use and celebration of reason, the power by which humans understand the universe and improve their own condition. The goals of rational humanity were considered to be knowledge, freedom, and happiness. A brief treatment of the Enlightenment follows. For full treatment, see Europe, history of: The Enlightenment. The powers and uses of reason had first been explored by the philosophers of ancient Greece. The Romans adopted and preserved much of Greek culture, notably including the ideas of a rational natural order and natural law.