Some surgeons are injecting tiny amounts of silicone oil into the lips to plump them. A few types of silicone oil are approved for injection into the body, but others are not, and none are approved for cosmetic use.
Figure 10c-2: Sir Charles Lyell, 1797-1875. The theory of uniformitarianism was also important in shaping the development of ideas in other disciplines. The work of Charles Darwin and Alfred Wallace on the origin of the Earth's species extended the ideas of uniformitarianism into the biological sciences.
uniformitarianism The principle proposed by James Hutton (1726â97) and paraphrased as âthe present is the key to the pastâ, that the surface of the Earth has been formed and shaped by processes similar to those which can be observed today.