- the story of life on our planet.
我们星球上的生命的故事 - Life and all its incredible variety had to start somewhere.
生命及其难以置信的多样性 必然有其起源 - The first spark appeared four billion years ago.
第一丝火花出现在40亿年前 - Perhaps uniquely, our planet had just the right conditions.
也许我们的星球 独一无二地具备了适宜的条件 - Liquid water,
液态水 - energy from the Sun,
来自太阳的能量 - and the perfect chemistry for life to take hold.
以及适合生命诞生的完美化学条件