Name: 行星維持生命存在的要素
Uploaded: 2016-08-12T14:49:58Z
Duration: 13 min 32 s
Description: 「金星太熱，火星太冷，地球剛剛好。」行星科學家戴維．布萊因如是說。但是為什麼？布萊因在這場風趣幽默的演講中，探索行星要維持生命存在所需的幾項有趣科學，並且談到在行星維持生命的時間軸上，為什麼人類可能只是恰好在天時、地利、人和的情況下在地球上生活。

「金星太熱，火星太冷，地球剛剛好。」行星科學家戴維．布萊因如是說。但是為什麼？布萊因在這場風趣幽默的演講中，探索行星要維持生命存在所需的幾項有趣科學，並且談到在行星維持生命的時間軸上，為什麼人類可能只是恰好在天時、地利、人和的情況下在地球上生活。

行星維持生命存在的要素

Our planet is the only known place in the universe where 8.7 million species thrive, thanks to a rare balance of energy, nourishment, and liquid water. Even within our solar system, only Venus, Earth, and Mars once had a shot at surface water, but Earth's stable conditions set it apart. Planetary atmospheres and magnetic fields play crucial roles in protecting or stripping away the ingredients for life. With billions of potentially habitable planets in our galaxy, understanding Earth's unique story could reveal which distant worlds might also sustain life.