Readers Respond to the March 2025 Issue

FINDING A TOXIC SOURCE In “Penguin Cartography” [Advances], Gayoung Lee reports on research by marine biologist John Reinfelder and his colleagues about the accumulation of mercury in penguins. The story highlights gold mining as a source of such mercury. But according to an October 2010 article in the Woods Hole Oceanographic Institution’s (WHOI’s) journal Oceanus,…

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