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1. www.scientificamerican.com › article › what-birds-reallyWhat Birds Really Listen for in Birdsong (It’s Not ...

   www.scientificamerican.com › article › what-birds-really

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   2022年5月1日 · Beyond Melody. Birdsong researchers have known since at least the 1960s that birds hear song differently than we might expect. One of the classic ways to test perception in birds in the wild is...

   • 作者: Adam Fishbein

2. www.scientificamerican.com › article › essay-1991-04America' Green Strategy | Scientific American

   www.scientificamerican.com › article › essay-1991-04

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   1991年4月1日 · Simon Makin. New research harnessed the highly absorbent dye tartrazine, used as the common food coloring Yellow No. 5, to turn tissues in living mice clear—temporarily revealing organs and vessels...

3. www.scientificamerican.com › article › does-humanity-have-toDoes Humanity Have to Eat Meat? | Scientific American

   www.scientificamerican.com › article › does-humanity-have-to

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   2023年10月25日 · Humans have been around for about 2.5 million years. For at least 2.4 million years, people have been eating animals. This fact is evidenced by cut traces on fossil animal bones, surviving stone...