Don't forget to subscribe. And for more in-depth science news features, podcasts and videos, head to ScientificAmerican.com.

不要忘记订阅我们的播客。想深入了解更多的科学新闻、播客和视频，请访问ScientificAmerican.com。

So, when you finish this video, head over to Anna's channel, by clicking on the link in the description box.

所以，当你看完这个视频的时候，记得前往安娜的频道，单击描述框中的链接。

Right, so if you enjoyed this video, head on over to Anna's channel, where part two is waiting for you.

是的，所以如果你喜欢这个视频，那么请去安娜的频道，第二部分在等你。