KINDS OF SCIENTISTS

In my morning program, we have been studying different types of scientists. One of the scientists we studied is Charles Darwin, who lived from 1809-1882. His research changed the way we think about the natural world. He traveled all around the world studying different organisms and devised his Theory of Evolution, which was revolutionary at the time. Most scientists then believed that plants and animals  pretty much remained the same throughout time. But Darwin believed in "natural selection," meaning that only species that successfully adapted to the changing requirements of their habitat would survive while the rest wouldn't evolve and would eventually die off and disappear.

For a great explanation of how natural selection works, go to:
http://evolution.berkeley.edu/evolibrary/article/evo_25.