这一铱异常为阿尔瓦雷斯假说提供了强有力的支持，尽管小行星本身从未被发现。
This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been discovered.
如果该发现得到证实，这颗星球就是在银河系中所发现的第一颗外来的行星，同时该发现也将违背有关行星起源的最主要的假说。
If true, the world is the first planetary immigrant ever detected in the Milky Way. The find would also violate the leading hypothesis of how and where planets form.
盖亚假说引发我们把行星看作活的有机体。
The gaia hypothesis invites us to view the planet as a living organism.
但即使木马假说是错误的，行星相互共振也是十分有趣的现象。
But even if the Trojan hypothesis is wrong, it might be something just as interesting: planets in resonance with each other.
“胚种假说”假设：活细胞或其前驱物可能于数十亿年前发源自其它行星或月球上，并且搭陨石的便车来到地球。
The panspermia hypothesis posits that living cells or their precursors could have emerged on another planet or moon billions of years ago and hitched a ride to Earth on a meteorite.
“胚种假说”假设：活细胞或其前驱物可能于数十亿年前发源自其它行星或月球上，并且搭陨石的便车来到地球。
The panspermia hypothesis posits that living cells or their precursors could have emerged on another planet or moon billions of years ago and hitched a ride to Earth on a meteorite.
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