一项新的研究显示，南太平洋的座头鲸像人类一样，按照季节变化着追求的音乐潮流。
A new study reveals that, just like humans, humpback whales in the South Pacific follow musical trends that change by the season.
随着季节的变化和白天的变短，非常是时候回顾下我们所喜爱的一些美丽的自然图片，还有去看看那些新的图片。
So as the seasons change and the days grow shorter, it's a good time not only to look back at some of our favorite images of this natural phenomenon, but check out some new pictures, too.
在自然界中，颜色的变化可以是一个新季节开始的信号，或者提供了一个警告远离海湾食肉动物的信号。
In nature, color changes can signal the onset of a new season, or offer a warning sign to keep predators at bay.
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