The dream of sending humans to Mars is closer than ever before. In fact, many scientists think that the first person to set foot on the Red Planet is alive today. But where should the first explorers visit when they get there? Horizon has gathered the world's leading experts on Mars and asked them: where would they go, if they got the chance - and what would they need to surviv...。长久以来,人们一直在怀疑宇宙中是否存在其他的智慧生命形式。然后,为什么我们不首先在我们的海洋里找寻一下呢?鲸鱼和海豚,同人类一样有着巨大的大脑,善于学习新的行为,拥有自己的社交语言。我们渴望了解,它们的思想与人类真的很接近吗?在巴哈马从事相关研究的丹尼斯赫青教授相信她即将找到问题的答案,她坚信五年内她将可以与野生海豚进行无缝交流。