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As we discuss the characteristics of life in Science class, students are quick to realize that Life must have begun somewhere. We talk about the conclusions reached by most biologists, based on evidence that points to life's origins in Earth's oceans 3.5 billion years ago. Changes in each generation over the thousands of millions of years since then, and adaptations resulting from varying environmental factors, have resulted in the Diversity of Life that is the title of our first unit of study. Here is Matt Groenig's more accessible explanation:
I trust that my students are so evolved, that they will ignore the Hulu advertisements in this clip. The cartoon
above is based on the concept of "transitional forms." There
are many transitional fossils that have been found:
http://en.wikipedia.org/wiki/List_of_tra…
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