Skin is made in large measure of a protein called collagen.

I believe the evidence strongly supports common descent. But the root question remains unanswered: What has caused complex systems to form?

Despite some remaining puzzles, there's no reason to doubt that Darwin had this point right, that all creatures on earth are biological relatives

Throughout history there have been many other examples, similar to that of Haeckel, Huxley and the cell, where a key piece of a particular scientific puzzle was beyond the understanding of the age.

As the number of unexplained, irreducibly complex biological systems increases, our confidence that Darwin's criterion of failure has been met skyrockets toward the maximum that science allows.

The theory of undirected evolution is already dead, but the work of science continues.

It is often said that science must avoid any conclusions which smack of the supernatural.