Cientistas se enganaram sobre água em Marte?

Estudo sugere que as formações rochosas ondulantes em Marte, antes atribuídas a rios e lagos, podem ter sido criadas por dióxido de carbono líquido, não água.

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A origem de água suficiente para moldar a superfície marciana é incerta.

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Os autores propõem o LCO₂ (CO₂ líquido) como mais uma peça no enigma.

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Pesquisadores apontam apenas dois candidatos para a formação: água ou dióxido de carbono líquido, considerando recentes estudos sobre sequestro de carbono em Marte.

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Três possibilidades para a presença de LCO₂ em Marte são apresentadas: estabilidade na superfície, derretimento sob gelo de CO₂ e reservatórios subterrâneos.

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A teoria de CO₂ líquido não é comprovada, mas os cientistas afirmam que a chance é alta o bastante para não ser ignorada.

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Novas investigações Pesquisadores pedem novos experimentos para avaliar a hipótese.

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