The Panda's Thumb is a much more serious and scientific blog countering creationism, and I recommend it. It's named after a very famous piece of unintelligent design. A panda's paw consists of five digits each with a claw, similar to a regular bear. But pandas also have a sixth digit, a rudimentary opposably thumb that evolved from a small bone called a radial sesamoid, which in bears and other creatures is only used for strengthening connective tissue. Pandas can press this thumb against their palms and use it to grip bamboo shoots. If the panda had been designed for eating bamboo, it would make much more sense to have a "proper" opposable thumb like the rest of us.
You can read more about the panda's thumb here.