<story><title>Traces of ancient ocean discovered on Mars</title><url>https://phys.org/news/2022-10-ancient-ocean-mars.html</url></story><parent_chain><item><author>mach1ne</author><text>Mars lost all of its (surface) water presumably due to solar wind, and thus never had time to evolve complex life. Earth would have faced the same fate were it not for the fact that the Moon collided with us at some distant point in time, surrendering its iron core to ours. Now, our Rare Earth has an unnaturally large active iron core, resulting in an unnaturally efficient magnetic field which is able to protect our waters from being blown away by Sun.</text></item></parent_chain><comment><author>Aardwolf</author><text>Just wondering, what would have stopped the Earth from having enough iron on its own in the first place? If the Moon could have that much iron, the Earth could as well have had it without needing to mix with the Moon, they&amp;#x27;re made from the same original matter after all.</text></comment>
<story><title>Traces of ancient ocean discovered on Mars</title><url>https://phys.org/news/2022-10-ancient-ocean-mars.html</url></story><parent_chain><item><author>mach1ne</author><text>Mars lost all of its (surface) water presumably due to solar wind, and thus never had time to evolve complex life. Earth would have faced the same fate were it not for the fact that the Moon collided with us at some distant point in time, surrendering its iron core to ours. Now, our Rare Earth has an unnaturally large active iron core, resulting in an unnaturally efficient magnetic field which is able to protect our waters from being blown away by Sun.</text></item></parent_chain><comment><author>atoav</author><text>One might be inclined to attribute the amount of good luck to devine intervention, but to this I would say: If the conditions on our planet would not have allowed for higher life, nobody would have been there to ask themselves why the conditions were slightly off.</text></comment>