Experts are working to start a new excavation at an ancient Bronze Age site before climate change causes irreversible damage. Mark Knight from the Cambridge Archaeological Unit warned that if the site isn't excavated in the next few years, valuable historical information will be lost forever. The excavation will take place at Flag Fen, near Peterborough, one of Britain's most significant Bronze Age sites. The site includes a massive timber causeway that was approximately 1.1 kilometers long, 20 meters wide, and constructed with around 22,000 wooden posts. This structure is believed to have facilitated communication and trade, connecting two areas of dry land over a region that became wet around 3,300 years ago. Mr. Knight, who will lead the new excavation, explained that the site's information has been preserved in wet peat for thousands of years due to the lack of oxygen. However, rising temperatures and drier conditions linked to climate change are causing the peat to dry out, putting the site at risk. A section of the causeway that is closer to the surface is drying out more quickly, increasing the urgency of the project. Jacqui Mooney, general manager at Flag Fen Archaeology Park, expressed concern over a recent peatland fire at Holme Fen, about 11 miles away, which occurred during a period of drought. She emphasized the importance of preventing similar incidents at Flag Fen, a site of immense historical significance. The excavation, set to begin next year and last six months, has received £700,000 in funding from the Countryside Stewardship Heritage Service, a partnership between Defra and Historic England. Mr. Knight noted that this will be the largest area excavated at the site to date. "We want to gain a broader understanding of the site and see it for what it really is," he said. Over the past 40 years, the site has been studied extensively, but the investigations have typically focused on small, targeted areas. Previous interpretations of the causeway included its use as a ritual site where people might have deposited metalwork or the dead. However, it also served as a vital route for communication, trade, and movement of people and animals. Flag Fen has been listed on Historic England's Heritage at Risk Register since 2012, highlighting its importance and vulnerability. Few Bronze Age platform structures of this scale and complexity have survived globally, making Flag Fen a nationally significant site. Farming Minister Stephen Morgan praised the site as a unique window into Bronze Age Britain and expressed support for the investment in the community project. The excavation will also provide volunteering opportunities, with participants receiving training to become supervisors and tour leaders, helping to preserve and share the site's history with the public.