Questions for ‘Scientist tackles water pollution with epic swims’

What's hidden in the river? During his epic swim of the Tennessee River, a German scientist sampled — and then studied — the pollutants he encountered.
Courtesy of Andreas Fath
What's hidden in the river? During his epic swim of the Tennessee River, a German scientist sampled — and then studied — the pollutants he encountered.
Courtesy of Andreas Fath
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