Plate Tectonics Plate tectonics are a relatively new theory that has revolutionized the way geologists think about the Earth. According to the theory, the surface of the Earth is broken into large plates. The size and position of these plates change over time. The edges of these plates, where they ...

Since it's early beginnings some 4.6 billion years ago, the earth has been constantly changing its face. Oceans have become deserts and what was once mountainous terrain has found itself submerged in salt water oceans. Underwater volcanoes create new surfaces daily which one day may host a n...

Jean Baptiste Lamarck The French Naturalist Jean Baptiste Lamarck pronounced the first comprehensive theory of evolution in the beginnings of the 19th century. His theory, the theory of acquired characteristics, had three parts and is as follows: 1) Theory of need- the production of a new organ o...