Evolutionists like to point to the evolution of mammals as a well evidenced series of steps from creatures called therapsids (which were a subgroup of non-mammalian synapsids) living about 200 million years ago. One key fossil which is said to be transitional is Morganucodon.

Close examination of the evidence shows that it is not as strong as evolutionists believe. I have written something about this fossil which will be published in the Creation Ministries International Journal of Creation.