A Belated Science Note from Living on Earth

My final Science Note was aired on last week's Living on Earth show. It's about ambergris, a substance excreted by sperm whales and valued by perfumers. Listen here to find out how natural ambergris could soon be replaced by a laboratory-made alternative. 

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Noise Pollution Also Threatens Fish: New on AAAS

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Two New Stories on AAAS Member Central