What is Paleontology?
How do we know what type of organisms lived on the earth before we did? How do we know that dinosaurs, mammoths and other creatures lived before us? Scientists use paleontogy to study the ever-changing earth to try and figure out what came before us. But what is paleontology? Paleontology is the study of prehistoric life, including the evolution of organisms and fossils. Scientists use paleontology to determine what lived on the earth before us. Paleontology has helped us discover that dinosaurs used to roam the earth, and before that little organisms lived on earth also.
What is Radiometric dating?
Is a technique used by scientists to determine the correct age (or as close as possible!) of fossils and rocks by using the surrounding rocks or dirt itself and using the decaying rates. Paleontologists use Radiometric techniques to estimate accurate ages for fossils.
What is Biogeography?
How are there six types of moose and of which four reside in North America. The other two sub-species live in Europe. Why are they on different continents? Did they swim across the ocean to Europe, or from Europe to North America? That's where Biogeography comes in. Biogeography explores in depth the variations of different types of species, and their distribution on earth. Biogeography studies the past and present of species. Since the beginning of Earth's creationg, the landmass has changed over millions of years. Thanks to scientists and their vigorous studies, we know that aproximately 225 million years ago Asia, Africa, North America, South America, Antartica, Europe and Australia were all part of one continent, called Pangea. As a result of one ultimate continent, organisms that date to 150 million years ago (Thank you fossils!) and older that were once in the same region we split up when Pangea was split up.
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