I’ve decided to try writing more spontaneously rather than delving a lot into sources of information like I have been recently. It’s good exercise for the memory and makes for a livelier style. Maybe it’ll also end up being less accurate, as I’m drawing on stuff from the 1980s here.
The other day someone posted a meme about humans being cute for various reasons. In general it was a good meme, but one probable inaccuracy jumped out at me. It was something like “although they’re not aquatic or amphibious, humans flock to be near water just for the pleasure of splashing about in it”. Fair enough as a bit of a meme I suppose, but probably wrong, because some people think we were once “aquatic apes” as the phrase has it, notably Elaine Morgan and manwatcher Desmond Morris. That’s in quotes because the idea isn’t that we used to be like dolphins, living in the sea full-time, but amphibious, living on beaches and in the sea, perhaps foraging in both and escaping from predators by wading into the water. It’s also suggested that the surviving species of elephant have a similar history. This is in contrast to the more usual savannah theory, which claims that we are descended from an ape who had to adapt to the veldt when the African rainforests dwindled due to the world drying up. I’m going to talk about this bit too.
During the Miocene there were a huge number of different ape species. This has led to the human evolutionary “tree” being described as more like a bush, because some of them also show parallel evolution, becoming steadily more like hominins but are in fact our sister groups. The world was wetter at the time because the Tethys Ocean, which encircled the equator, was able to flow all the way round, meaning there was no permanent ice in the Arctic and therefore more water available to the planet’s weather systems. This in turn meant larger rainforests. Then North and South America collided and the Gulf Of Mexico formed, causing the warm current to swirl round and head North, where precipitation increased and snow and ice built up, increasing the planet’s reflectivity and cooling it in a vicious circle which also dried it. Hence the rainforests shrank and some apes were forced onto the savannah, where according to Elaine Morgan they then died out, but according to other people they evolved into humans. Morgan managed to resolve this problem to her own satisfaction by suggesting that our ancestors survived by becoming amphibious and living on beaches and in the sea.
This is the evidence cited to support this claim:
- We have a diving reflex. If we are for some reason submerged, our hearts slow down.
- We are largely hairless. The body hair we have follows a streamlining pattern.
- We have more breath control than other apes have. Think of the hooting made by chimps. They do that because they can’t control their respiration.
- We have a hymen which protects us from sand entering our reproductive systems before penis in vagina sex takes place.
- Penis in vagina sex usually occurs face to face as in other aquatic mammals.
- The female orgasm. I can’t remember the argument for this.
- Large amounts of adipose tissue in breasts, enabling them to float and suckle young more easily in water.
- Long scalp hair onto which babies can hang in water.
- Downward-facing nostrils protecting us from accidentally inhaling water.
- Bipedalism is easier in water and is adopted by other apes when they are wading through water and may therefore have first evolved due to this lifestyle.
There may be other reasons but those are the ones I can remember and as I stated earlier I’m trying to research less and type more spontaneously. There are also a number of other observations which don’t pertain directly to the human body:
- There’s a gap in the hominin fossil record of several million years. I can’t remember where this gap is supposed to be or whether it’s still there, since Morgan’s ‘The Descent Of Woman’ was published in 1972 CE.
- All Afrikan primates except humans have a baboon-generated retrovirus code written into their genomes. No non-Afrikan primates have. This suggests that our ancestors were, for whatever reason, isolated from other primates when this happened.
- The oldest hominin remains, including tools, are found in Ethiopia and move south into the Rift Valley with time, suggesting that we spread from the Gulf of Aden southwards rather than from the Congo.
- The first human stone tools are made from pebbles, suggesting that the technology arose first on beaches.
There’s also a side argument that succeeds or fails separately from the aquatic ape hypothesis, that elephants also had an amphibious phase in their evolution due to several features they have in common with humans but not mammoths.
One reason Morgan made this claim was that she believed palaeoanthropology focussed too much on male bodies and that if female bodies became the focus a number of traits would be easier to explain, namely the ones listed above. Humans considered as female make much more sense as amphibious life forms than humans considered as male savannah-dwellers. There is, in other words, a strong feminist motivation in her acceptance of this hypothesis, or conversely, a strong patriarchal motivation in the establishment’s rejection of it. Now to me the interesting aspect of all this is not directly whether the hypothesis is well-corroborated but what it says about the scientific establishment and academic thought and research, particularly from a pro-feminist perspective. It’s also interesting to contemplate how I perceive it.
The hypothesis is generally viewed as pseudoscientific and thoroughly refuted but it’s recognised that it still surfaces from time to time and there is some endorsement from celebrity science popularisers such as Desmond Morris and David Attenborough. One issue with it is that because none of it seems to refer to bones and teeth, fossilised hominin remains are hard to assess on this basis. It can be asserted that we have a hymen, breasts, approach hairlessness and so forth, but none of that has to do with the skeleton. Against this, and this is just my opinion, is that adaptations to bipedalism are reflected in bones and joints. However, it is true that the fossil record is difficult to use to back this up, and this highlights a general problem with the reconstruction of vertebrates from most fossils: soft parts are rarely preserved compared to hard parts. This applies particularly to non-avian dinosaurs, who, being closely related to birds, might be expected to have structures like wattles and combs but it’s unlikely we’ll ever know unless we find alien video recordings of them or something. Pebbles, on the other hand, are clearly preserved, and these are again hard “parts”, so the question is, does this hypothesis really only depend on soft parts? It seems these are not soft at all.
I’m not a scientist. I have a fair bit of scientific knowledge and am aware of the scientific method, but I’ve done little research of my own since I finished A-level biology. Not none, because some of my herbalism-related CPD involved original quantitative research, but I’m not a palaeoanthropologist by any means. Gutsick Gibbon, however, is, and it seems fair to bow to her superior knowledge and experience. The issue is with the source. Elaine Morgan’s perspective on the issue was informed by her gender and allegiance to feminism: another of her books is ‘The Descent Of Woman’ which emphasises the increased explanatory power of a model of evolution which sets female bodies as the default rather than male. There’s a strong emphasis on “Man The Hunter” in traditional palaeoanthropology, which portrays men as going out to hunt dangerous prey and bringing them home to the cave while women stay in it, do a bit of foraging and take care of the children, and also that most of the nutritional value of the food they ate was in animals rather than plants. Apparently though, this is not reflected in hunter-gatherer societies as observed by Western anthropologists. The trouble is, though, that we tend to project our own ideas onto the past and that hunter-gatherer societies today, rather than being remnants of the Stone Age, have just as long a history as Western civilisation and its predecessors. The other aspect of this is that Morgan is probably surrounded by men in her profession and field, and therefore that she and her opinions are likely to be at a disadvantage which leads to more people working to refute her hypothesis unsympathetically. This is why I find Gutsick Gibbon’s rejection of it interesting, as she doesn’t seem to be motivated in such a way. However, it may also be that she’s influenced by the general dismissal of the idea by her colleagues and mentors. All of this brings up the question of how scientific theories change.
All of this is therefore about bowing to the opinions of experts who are fairly imagined not to be biassed in unhelpful ways. There’s a degree of trust there of professionals which may have been eroded in recent years, leading to various beliefs being accepted which would previously have been ignored. To my mind, it goes hand in hand with lack of deference, which is often a good thing. For instance, nowadays there seems to be either more awareness of corruption in authority or more actual corruption, and where it’s detected accurately, this must surely be a good thing. However, this approach of dubiousness may be dubious. An opinion is not correct or worth considering in itself when compared to other more learnèd opinions. Experience from outside the field may not be valid within it. OFSTED comes to mind here. Why should outsiders be listened to or taken seriously by educationalists and teachers with years or decades of experience?
Also, sometimes a particular characteristic can give rise to excessive sympathy. For instance, there is a Black supremacist group which maintains among other things that melanin alone is the seat of consciousness and therefore that only Black people are conscious. As a White person, I know this isn’t true. They also believe that a Black scientist working thousands of years ago invented the White race through genetic manipulation. There is certainly a sense of empowerment in these claims, but it occupies a special epistemological position because White people actually know that this is not the case. Regarding the origin of fair skin, this has happened several times in hominin evolution, notably among the Neanderthals, but the most recent appearance is apparently among the Eastern Hunter-Gatherers of the future Russian steppes about ten thousand years BP (BP = before 1950). Another, similar, example, is in the spelling, which I’ve adopted, of Afrika with a K. The reason for this given doesn’t seem to be very soundly based. The claim is that the spelling of “Africa” is entirely colonial and should therefore be rejected. That said, I also have the impression that that spelling is primarily promoted by Afrikan Americans and not actual Afrikans, and the K is also used in the Afrikaans spelling of the word, which is often seen as a language of conquest. Another big issue with this spelling is that Afrikan languages which don’t use Latin script wouldn’t use either C or K and in transliteration the former Roman province of Ifriqiya was written with the Arabic letter Qaf in mediaeval times (and of course the word “Mediaeval” is Eurocentric in any case). It is, however, spelt “Afrika” in Maltese and Cape Verdean Creole, and also in Swahili. In Wolof, it’s actually spelt “Afrig”! So the issue here seems to be that the K spelling, though it does exist in many Afrikan languages, may reflect a mistaken claim made by Afrikan Americans about the culture of an entire continent about which it’s impossible to generalise, but that mistaken claim may in turn arise from the people concerned lacking the opportunity or the information to recognise that their claim is dubious, and therefore I’m still going to spell it with a K. Maybe there’s something I don’t know, but the truth seems to be that the spelling varies and does sometimes include a C in languages which the people concerned own emotionally and consider to be Afrikan languages such as English, French and Portuguese, whereas the claim to the contrary seems to be pressured from outside the continent. Maybe I’m wrong, and I’m very open to that possibility.
Elaine Morgan, who sadly died in 2013 CE, is a somewhat surprising person. Her degree was in English and she was a TV script writer, so she’s an outsider with respect to palaeoanthropology. However, the aquatic ape hypothesis was not originally hers but was formerly mainly promoted by the marine biologist Alister Hardy. Of course, a marine biologist is not an anthropologist but he was a life scientist. Her motivation for adopting the hypothesis was, as I said, that the idea of “Man The Hunter” is androcentric but leaves a gap if it’s rejected as it’s then necessary to explain the differences between humans and other apes. It was claimed also that she didn’t realise that Hardy’s claim was a glib and off-the-cuff remark which was never intended to be taken seriously. This is not so, and he actually wrote the Foreword to the second edition of her book.
Most naked animals with subcutaneous fat are aquatic mammals. This is the basis of Morgan’s claim. Philip Tobias, discoverer of Homo habilis and shaper of the savannah hypothesis, eventually came to reject that. David Attenborough and the former promoter of the idea of “Man The Hunter” Desmond Morris, which previously irked Morgan and persuaded her to think otherwise, both appear to support it and her. One startling claim of hers is that early hominins were already relatively hairless. I’ve already mentioned that the idea that our ancestors were as hairy as chimps and gorillas may be mistaken because orangutan, the most conservative living great ape, is considerably less hairy than either and it’s already established that gorillas’ and chimpanzees’ knuckle-walking evolved separately after they diverged from their common ancestors, so this convergent evolution could equally apply to humans. Looking at it from the perspective of a through-line from the common ancestors of orangutan and humans to humans ourselves, their predecessors, related to gibbons, would’ve been hairier, and their descendants may have gradually lost their hair until today’s situation with humans. This doesn’t mean, though, that hominins didn’t habitually enter the water because that very lack of hair could’ve made it easier. Inherited characteristics appear before they’re tested. Moreover, our hair follows the lines of water currents across our bodies as if we were swimming forward in the water, with axillary and pubic hair, for example in regions facing away from the flow and also with tracks of lanugo or terminal hair in the same direction.
An example of the kind of criticism Morgan received was that her ideas were “thought up by a Welsh housewife”. Not only is there nothing wrong with being either Welsh or a housewife, but also that fails to take into account that she was a scriptwriter for ‘Doctor Finlay’s Casebook’ and later ‘The Life And Times Of David Lloyd George’ and the TV adaptation of ‘Testament Of Youth’. It might be a valid criticism of her writing that her degree was in English Literature rather than a science, but this wasn’t the focus. Instead, her academic credentials and career success were ignored completely and she was apparently assumed to be primarily a home maker and her Celtic heritage was associated with ignorance and low intelligence, so it was both racist and sexist. Her response to this, perhaps typically for a woman of her time, was to point out that it was an eminent male Sassenach biologist, knighted for services to science and Fellow of the Royal Society, who had previously proposed the idea. In this case, though, Hardy’s ethnicity and gender didn’t protect him either as his ideas were equally poo-pooed by the scientific establishment. It doesn’t mean he was right of course, but it’s telling that the response to the same ideas being proposed by a Welsh woman focussed not on the validity or otherwise of her ideas but on her identity. All that said, it doesn’t mean she was right either and her position doesn’t confer infallibility. She could also be expected to have some kind of academic rigour but the fact is that she was not a scientist. Creative writing, however, does benefit from thorough research, and I’m guessing that her work on ‘Doctor Finlay’ increased her knowledge of human biology and the process whereby diagnoses are made on the basis of evidence. Perhaps another main issue with her is that she was to some extent an autodidact.
Here comes another bullet list:
- The only mammals with descended larynxes are humans, a species of North American deer and several species of aquatic mammals.
- The only mammals which are born covered in vernix are humans and harp seals.
- Baby humans have five times as much fat proportionately as baby baboons. When immersed in water they float face up due to the distribution of that fat.
- Not only is our sense of smell weak because we’re apes, but it’s actually even weaker than other apes. The only other mammals with such a poor sense of smell are aquatic, notably whales. This is because breath control makes it less functional. In the case of sperm whales, they hold their breath regularly for up to ninety minutes.
- We sweat more than any other species of mammal. On the arid savannah, this would be a major liability.
- The brain needs high levels of both ω-3 and ω-6 fatty acids, which are most common in the marine food chain. Just as a side note, although these fatty acids are generally used as an argument for eating fish, organ meat and wild animals, they’re plentiful in marine algae and are not made by animal sea food sources themselves, so this is not an argument not to be vegan.
Incidentally, it’s notable that the points about vernix and baby fat are likely to be more evident to people who have given birth than those who haven’t.
It was recently found also that the “savannah” sites where hominin fossils are found have pollen from plants only found in forests, even including liana vines, which are only found in very dense rain forests. Hence the theory that humans, sweating profusely and becoming dehydrated on the savannah, evolved there seems now to have been refuted. Humans did evolve there to some extent, but the areas which are savannah now don’t seem to have been savannah back then. Although the savannah hypothesis seems to have been refuted, it hasn’t been replaced by the aquatic ape hypothesis.
Even so, a wide-ranging comparison of humans and aquatic mammals, even beavers and otters, shows little similarity. Clearly swimmers and divers have health problems arising from their activities such as nitrogen narcosis and swimmers’ nodes in the external auditory meatus due to water getting trapped in the ears during diving. It is the case that diving animals do get the bends, and there are even fossils of marine reptiles showing evidence of it, so the mere fact of nitrogen narcosis may not be adequate evidence, but it isn’t at all clear why swimmers’ nodes would develop if we used to immerse our ears regularly.
What I take away from all this is a feeling of uncertainty. Although I can clearly see how Morgan’s ideas were rejected for ad hominem reasons, or at least that this is a factor in their rejection to a greater extent than the ideas of others were, there are clearly people out there with a lot more knowledge and experience in the field than I who continue to reject them, presumably with good reason. It helps that a famous female palaeoanthropologist rejects them too. I wonder if this is connected with the wave of feminism each is associated with. The fact that they’re also endorsed by respectable science popularisers with a background in relevant fields also seems to help back them up, but by saying that I seem to be committing the same fallacy as I’ve just accused others of committing against her. But one thing is for sure: Morgan may be wrong, but the objections made to her are primarily sexist and to some extent racist, and we’re now left with no hypothesis at all regarding the circumstances of evolution, and that seems most unfortunate.















