Stretching over ten miles through Cumbria’s countryside, Windermere isn't just England's largest lake – it’s a real-life classroom, helping us to understand how our environment is changing over time.     Join Alice and Sue as they venture onto the water with UKCEH scientists Eleanor Mackay and Heather Moorhouse. Together, they explore the deep waters and vibrant ecosystem of this iconic lake, where researchers have been monitoring everything from water quality to wildlife for nearly eight decades.     They also catch up with Taylor Butler-Eldridge, from the University of Exeter, to discuss his fascinating research into the world of open water swimming. UK Lakes Portal - https://eip.ceh.ac.uk/apps/lakes/ UKCEH Algal bloom app - https://www.ceh.ac.uk/our-science/projects/bloomin-algae Hosts: Sue Nelson and Alice Hope  Producer: Rachael Buchanan Counting the Earth is a Boffin Media Production for the UK Centre for Ecology & Hydrology.