A vast graveyard of ancient whales, dating back five million years, has been discovered on the coast of Chile, with a team of British scientists at the forefront of the excavation. The site, known as Cerro Ballena, has yielded dozens of remarkably well-preserved skeletons, offering an unprecedented window into the mass die-offs of these marine giants during the Miocene epoch.
The fossils, many still fully articulated, were found cemented in rock layers that once formed a tidal flat. The researchers believe the whales died in four separate mass stranding events, likely triggered by toxic algae blooms. This pattern mirrors modern whale strandings, suggesting that harmful algal blooms have plagued cetaceans for millions of years.
Lead paleontologist Dr. Nicholas Pyenson of the Smithsonian Institution, who collaborated with British colleagues from the University of Bristol, described the find as a “paleontological treasure trove”. The skeletons include nine species of baleen whales, some over eight metres long, as well as an extinct species of sperm whale, seals, and an aquatic sloth.
“This is a truly exceptional discovery,” said Dr. Maria Fernanda Sandoval, a paleontologist at the Natural History Museum in London, who was part of the team that analysed the fossils. “The sheer number of individuals and the quality of preservation are unheard of. We can see bite marks from sharks, evidence of scavenging, even the remains of their last meals.”
The excavation was carried out during the construction of a new highway near the port of Caldera. Road builders uncovered the first bones in 2010, sparking a five-year project to salvage the fossils before the road was laid. The team used 3D scanning to create digital models of each skeleton, allowing them to reconstruct the ancient environment.
Dr. Pyenson said the findings, published in the journal Proceedings of the Royal Society B, challenge assumptions about the stability of ancient marine ecosystems. “We think of the oceans as timeless, but this shows that catastrophic events have devastated whale populations repeatedly. The same toxins that kill marine life today were doing so five million years ago.”
Local communities in northern Chile have embraced the site as a cultural landmark. The fossils were left in place where possible, and a museum is planned to showcase the discovery. For the British team, the work underscores the importance of international collaboration in understanding Earth’s deep history.
“Whales are sentinels of ocean health,” said Dr. Sandoval. “By studying their ancient remains, we can see how they responded to environmental change. That knowledge is vital as we face a rapidly warming world.”
