South Africa: Mossel Bay – Ancient Coast Where Humanity Began

🧑‍🏫 Meeting Christopher and the Mosaic Tunnel

We met our guide Christopher outside the golf course clubhouse. He was a delightful young man — knowledgeable, enthusiastic and genuinely passionate about the site and its significance, which made an enormous difference to the whole experience. From the clubhouse we made our way down through a 50-metre tunnel that connects the surface complex to the clifftop trail above the caves. The tunnel had been lined with mosaic panels depicting scenes of South Africa more broadly — the Garden Route coastline, local flora and fauna, the particular character of Mossel Bay and the wider Western Cape — and it was clear that the decorative project was well underway but not yet finished when we passed through. Work had apparently begun in August 2022, just a couple of months before our visit, and there was a middle-aged gentleman kneeling on the tunnel floor working carefully on one of the panels as we walked through, adding tiny tesserae to what looked like a seabird in flight. We exchanged a nod. He seemed entirely unbothered by the small crocodile of tourists shuffling past him. Good on him, really.

On the far side of the tunnel, a large display panel laid out the broad context of the site — the remarkable geology of the Pinnacle Point headland, the flora and fauna of the surrounding coastal fynbos, and a summary of the extraordinary archaeological story that had been pieced together over more than two decades of excavation. It was a useful primer before Christopher began going into proper detail, and we spent a few minutes taking it all in before heading off along the cliff path.

🔬 The International Research Team and How It All Began

The discoveries at Pinnacle Point have been the work of a genuinely international team of researchers, led by palaeoanthropologist Professor Curtis Marean of the Institute of Human Origins at Arizona State University, working alongside colleagues from the University of Cape Town in South Africa, La Trobe University and the University of Wollongong in Australia, and partner institutions in Israel and France. Excavation work began formally in the year 2000, though local people had been aware of the caves and their unusual contents for considerably longer before that. What brought the international scientific community to this particular stretch of the Western Cape coastline was a piece of quite brilliant deductive reasoning on Marean’s part: faced with the puzzle of where early Homo sapiens had sheltered during a prolonged period of catastrophic global climate stress — the last great ice age, during which much of Africa became desiccated and largely uninhabitable — he systematically analysed geological formations, prevailing sea currents and long-term climate data to identify locations along the southern African coast where conditions might have been survivable. Pinnacle Point came up as one of the most promising candidates, and subsequent excavation proved the hunch spectacularly well-founded.

🏛️ Why Palaeontologists Now Agree on Africa

After decades of sometimes heated debate within the academic community, palaeontologists now broadly agree that there is sufficient genetic, fossil and archaeological evidence to conclude that anatomically modern Homo sapiens first evolved in Africa, with the best current estimates placing that emergence somewhere between approximately 200,000 and 160,000 years ago. This was a period when the global climate was dramatically different from today: vast ice sheets locked up enormous quantities of fresh water, sea levels were significantly lower, and large areas of Africa that are now relatively habitable were dry, arid and extraordinarily hostile to human survival. Fossils and archaeological sites from this critical early period in our species’ history are correspondingly rare across the continent, because most of the places where our ancestors lived have since been buried, eroded or simply rendered inaccessible. Pinnacle Point survived precisely because it was eventually sealed beneath a sand dune, protecting its contents from the elements for tens of thousands of years until Marean and his team came along with their trowels.

🗿 Cave 13b and What Was Found Inside

The cave in which the most significant artefacts were uncovered goes by the wonderfully matter-of-fact designation of 13b — there are around fifteen caves of archaeological significance across the Pinnacle Point headland, so they had to call it something, and apparently the naming committee wasn’t feeling particularly poetic that day. Within 13b, the evidence for what archaeologists call symbolic behaviour came principally in the form of scraped and ground ochre — more precisely described as limonite-bearing powders — that are believed to have been deliberately processed and used as a pigment, most likely for some form of body decoration or marking. Alongside the ochre, the team found small, precisely manufactured stone blades and evidence that certain flint tools had been deliberately heat-treated before use, a surprisingly sophisticated technique that improves the quality of the finished tool by altering the crystalline structure of the stone. Engraved shells were also recovered from the deposits. These discoveries, taken together, were deeply significant because they contradicted the previously dominant hypothesis — what academics had referred to as the “cultural explosion” or “cultural leap” model — which held that truly modern human behaviour had emerged quite suddenly around 40,000 years ago, primarily in Europe. The Pinnacle Point evidence pushed that date back by well over 100,000 years and placed the origin of behavioural modernity firmly in sub-Saharan Africa. A fairly important rewrite of the human story, by any measure.

The prevailing theory for why our ancestors ended up in these coastal caves in the first place is tied directly to that period of severe climatic stress. As the interior of Africa dried out and traditional food sources became scarce, coastal environments offered something that the parched savannah could not: a reliable, year-round supply of protein in the form of shellfish, marine mammals and other sea creatures. Pinnacle Point, positioned above a productive stretch of coastline with easy access to rocky intertidal zones, would have been an exceptionally good place to be alive in difficult times. Our ancestors, it seems, were considerably more resourceful than the older models of human cognitive development had given them credit for.

In December 2012, Heritage Western Cape — the provincial heritage resources authority — formally declared Pinnacle Point a provincial heritage site, recognising both its scientific importance and its cultural significance. In 2015, the South African government took the further step of submitting a formal proposal to add the cave complex to the UNESCO World Heritage List, and it has since been placed on UNESCO’s tentative list as a potential future serial nomination alongside five other remarkable South African prehistoric sites: Blombos Cave, Sibudu Cave, Klasies River Caves, Border Cave and Diepkloof Rock Shelter. If and when that serial nomination is formalised, it would create one of the most extraordinary prehistoric World Heritage Sites on Earth.

🥾 The Cliff Trail, the Snails and the Wind

From the display panels, we set off along a narrow cliff trail that forms part of the Saint Blaize Trail, a longer coastal walking route that we’d explored the opening section of the previous afternoon during our time in Mossel Bay town itself. The path hugs the clifftop and is, it has to be said, not for the faint-hearted — there are steep and unguarded drop-offs to one side, with the rocks and the churning sea a long way below. Not ideal if you suffer from vertigo, and Karen gave those edges a fairly wide berth. The rain from earlier hadn’t helped matters, either: the path was somewhat slippery underfoot, dotted with snails who had clearly decided that a wet Tuesday morning was exactly the moment to come out and make themselves known, and the wind off the ocean was doing its best to remind us that the Southern Cape is not always the sun-drenched paradise the travel brochures imply. The clifftop section is mercifully short — only a few hundred yards — before the path gives way to a flight of 175 steps carved and bolted into the cliff face, leading down to the cave level.

🐋 An Unexpected Sideshow: Whales and Dolphins

We’d barely started descending those 175 steps when the ocean below decided to put on an entirely unscheduled wildlife display that frankly upstaged everything that came before or after. A pair of Southern Right Whales materialised from the swell close to the base of the cliffs, and one of them — a younger individual, clearly full of the joys of a Tuesday morning — began performing in earnest. It breached twice, launching its considerable bulk clear of the water and crashing back down in an explosion of white spray, before settling into an extended sequence of tail slaps and fin slaps that echoed back off the cliff face. We watched, slightly stunned, from the steps. Then, as if the whale had sent out an invitation, a pod of common dolphins arrived from further along the coast and joined in the general celebration, leaping and spinning in the wake of the whale with what could only be described as infectious enthusiasm. It took us quite a while to make it the rest of the way down to Cave 13b, and nobody complained about that in the slightest.