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公鸡为什么会在早上打鸣？

 3 years ago
source link: https://tech.sina.com.cn/d/v/2020-05-20/doc-iirczymk2561996.shtml
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来源：中国科普博览公鸡在早上咯咯咯打鸣，对于大多数人来说，似乎是一个理所当然的现象。在许多国家，公鸡的啼叫被当作破晓的象征。但“公鸡为什么会在早上打鸣”？这个问题可不简单，甚至难倒了科学家。也许你不会相信，直到2013年才有科学家就这个问题

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