My Inner Fish

We just finished watching the series, "Your Inner Fish." The series discussed the different features of modern mammals that came from fish and reptiles, and how the benefited us, such as hair, skin, bone structure, and hearing. There were many fossils that showed how certain features transitioned from reptile or fish to mammals, and there are some species that still show some of these transitions alive today. Like we learned in class, natural selection chooses the best traits to be passed down, and possibly create a new species. Two of the most important questions we were asked were, "Why are mass extinctions important?" and, "Why is the series called 'Your Inner Fish'?" Mass extinctions are extremely important. They cause many species to go extinct, which allows the surviving species to take their place, and allows new organisms to evolve. Without them, we wouldn't be here today. The name of the series may not seem as important, but it explains a lot. Because we have all evolved from fish, this helps to reveal that we have many similar traits with fish, but because of evolution and natural selection, we have become a whole new species.

Diagrams of different embryos showing how some of the similarities  between humans and fish