Did you know that some iguanas can make themselves smaller?
Darwin's theories are nearly 150 years old, but the debate over how schools should teach the origins of life continues.
Lonesome George is the last of his kind.
These plants and animals may be on their way to extinction.
His ideas forever changed people's understanding of themselves in relation to all other living things.
What might happen if you took animals out of their natural habitat and brought them to a new environment where they did not naturally occur?
How do species change in nature?
What steps do these arctic birds take to make themselves at home?
Have you wondered how dolphins came to be such good swimmers?
Observing these birds helped the scientist formulate the theory of evolution.