本集内容. Dogs were man's best friend far earlier than thought. 狗成为人类 “最佳伙伴” 的时间远早于早前认知. 文字稿. It's a small piece of jawbone, bu ...

Time to stop using single-use plastic cutlery Man solves 20,000-year Ice Age drawings mystery 英国男子解开两万年前冰河时期洞穴壁画之谜 Episode ...