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Rock snot is an alga that looks exactly as it sounds - like snot. Rock snot was first recorded in Lake Superior in 1961 as a natural part of the lake. However, in 2018, it was discovered in the Poplar ...

Rock snot is an invasive species that threatens local streams and rivers. It was discovered in Minnesota in 2018 near Lutsen, in the Poplar River, and continues to spread every year. Being a ...