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.
Principles Of Uniformitarianism. Simply stated: The present is the key to the past. The processes that we see in operation today are the same ones that have operated in the geologic past. The principle allows geologists look at ancient rock formations and compare their structures to present day features in order to determine what formed them.