My Inner Fish Reflection

The video series was about how evolution in past species has led up to humans. We've learned about evolution, and this series shows proof of evolution.
 The human skeleton and the fish's skeleton are actually related, having similar muscles and bone structure. The human skeleton had come from the fish's skeleton. Many species had common ancestors, like a chicken and a human. Fish gill slits are still on human and chicken embryos.
Mass extinctions are important because they give other species a chance to flourish. When dinosaurs were around, mammals had to hunt during the night and sleep during the day. Because the dinosaurs all went extinct, mammals had a chance to thrive. Extinctions give other species a second chance.