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 ...

UK scientists to examine the world's oldest ice sample 英国科学家将仔细研究世界上最古老的冰层样本 Episode 250731 / 31 Jul 2025 Practise your ...