“It is often assumed that Alister Hardyâ€™s and Elaine Morganâ€™s aquatic ape theory (AAT) suggests that more than 5 Ma (million years ago) there was a semi-aquatic phase in our past (explaining e.g. human fur loss, fatness and upright bipedalism), which was followed by a savanna phase on the African plains. In 2011, AAT proponents published an eBook, ‘Was Man more aquatic in the past?’, which showed a rather different picture of AAT.” – Marc Verhaegen
He was kind enough to comment on my post, and you can see that at the link above. If you are interested in the Aquatic Ape Theory, or in human evolution in general, I encourage you to go and read his Scienceblogs guest blog.
June 09, 2013 – The theory continues to evolve. See this post and ensuing discussion at the blog, The Aquatic Ape.