The Discovery Institute is not a reputable source of scientific information. They are functionally a religious organization decorated to appear like a science organization.<quoted text>
They give references of their information as they go and after each article. And PBS - Evolution Home - is a scientific source? I beg to differ. It does not have links to their source or even tell where they get the information.
This does not mean that they haven't reported accurate and scientifically valid information. However, that is not their agenda and the opposite is often noted with this organization. They support the religious concept of intelligent design and not science.