A team of British palaeontologists has uncovered a vast graveyard of fossilised whales in the Atacama Desert of northern Chile, dating back five million years. The site, which contains at least 75 individual skeletons, is being hailed as one of the most significant marine fossil discoveries of the century.
The excavation, led by Dr. Nicholas Pyenson of the Smithsonian Institution and supported by researchers from the University of Oxford and the Natural History Museum in London, has revealed a dense concentration of whale remains preserved in what was once a shallow coastal lagoon. The fossils, including baleen whales, sperm whales and dolphin-like species, are thought to have died in a series of mass stranding events.
Preliminary analysis suggests that repeated toxic algal blooms, known as red tides, may have poisoned the whales. The warm, oxygen-poor waters of the lagoon likely preserved the carcasses with remarkable detail, including intact ear bones and stomach contents.
“This discovery offers an extraordinary window into the behaviour and ecology of ancient whales,” said Dr. Sarah Gibbons, a lead researcher from Oxford. “It is a rare opportunity to study a prehistoric mass mortality event in the fossil record.”
The Chile site, known as Cerro Ballena, or Whale Hill, has been under excavation since 2010. However, the current phase of work, which began earlier this year, has yielded the highest concentration of skeletons yet. The team has used 3D scanning technology to document the fossils before they are removed for conservation.
Chilean authorities have designated the area a protected fossil zone. The government has committed to building a museum on site to house the findings and make them accessible to the public.
The discovery has broader implications for understanding marine ecosystems and climate change. The Pliocene epoch, when these whales lived, was characterised by warmer global temperatures similar to those projected for the coming decades. Studies of the fossil record at Cerro Ballena may help predict how modern marine life will respond to environmental shifts.
British scientists have played a central role in the project, securing funding from the Leverhulme Trust and the Royal Society. The work is expected to continue for at least another five years.
The findings were published today in the journal Proceedings of the Royal Society B. “This is a landmark in palaeontology,” said Dr. Pyenson. “It changes our understanding of whale evolution and the history of the oceans."
