Scientists designated a small body of water near Toronto, Canada as ground-zero for the Anthropocene, the proposed geological epoch defined by humanity's massive and destabilizing impact on the planet. Because of its unique composition, Crawford Lake holds layers of sediment in its depths that have remained unaltered for thousands of years, mirroring the various suspended substances in the region and beyond, including human pollution. "In the 1950s, the United States started doing more atomic bomb testing", explains Paul Hamilton from the Canadian Museum of Nature. "So we started to map the amount of plutonium that's in the atmosphere, that got down in the sediment, into the core, into our small lake." REFILE OF REPORTAGE ON THE CRAWFORD LAKE SHOT IN APRIL IMAGES AND SOUNDBITES ARRANGED IN SEQUENCES