为什么狗与主人团聚时 “喜极而泣”？ Episode 220922 / 22 Sep 2022 本集内容 What does it take to make a dog cry 'happy tears'? 为什么狗与主人团聚时 “喜极而泣”？ 文字稿 While dog owners are familiar with face-licking and tail-wagging, a new ...

Georgina Rannard, BBC Correspondent Bees gather what they need to make honey from flowers, and that honey is their food in winter. But to replace the honey that we eat, lots of beekeepers feed them ...