Human Sperm Gene Hasn't Changed for 600 Million Years
A gene that has been stuck in purifying selection for 600 million years appears to be required for sperm reproduction in possibly all bilateral animals.
The article makes grandiose claims about the gene being unchanged in all animals, so I went and did some actual reading of the article. It is cool, to be sure, and could give us a gene to target to make a male contraceptive that is nearly 100% effective. However the gene has changed some, and it is actually only found in the bilateral animals and cnidarians, not in sponges (although it could be found later in sponges.)
Anyways, here the link to the journal article
, and here is an image
from it showing the conservation of the gene.
Note that now all the sites are the same, but there is striking similarity. This is the protein sequence by the way, it tells us nothing about silent site mutations. Also, for the creationist idiots, note that this gene alone almost gives a perfect view of the evolution of animals as it is currently understood (lampreys and sea urchins aren't quite right though).
Anyways, evolution is cool and learning more stuff and helping us understand ways to make our lives better. What has religion done for us lately?