My Inner Fish

        This series called "Your Inner Fish", which features Neil Shubin, really helped my understanding evolution more. It surprised me to learn that our hands could have developed from the fins of fish that moved to land, such as the Tiktaalik. The "Sonic Hedgehog" gene interested me the most. This gene is what determined our fingers, also called digits. We aren't the only species that form digits, for example chickens do, and from studying chick embryos, Dr. Cliff Tabin found a certain gene that determined digits, the "Sonic Hedgehog" gene. Another interest of mine was the development of hair. The reason of the development of hair was first as a sensory factor. Hair later on developed to keep mammals warm and protect the skin. The skin formed from reptiles. This series is very informative and I recommend it to anyone who would like to learn more about human ancestry and evolution.


https://en.wikipedia.org/wiki/Neil_Shubin