Having taken both a chordate anatomy class and an evolution class, this article about an aquatic origin for humans is quite intriguing. Many of the adaptations shown by humans could be explained by certain aspects of an aquatic life. The examples they give are not in depth enough to be convincing though. This is just an article from a popular scientific magazine, and thus hardcore facts are avoided. Also, it seems that the researchers are jumping to conclusions. Yes, brain size and posture could be explained by this theory. The main problem is that there are no other concrete facts that support this idea, such as a fossil record that shows evolution of these traits.