USresearchershavefoundtracesofanancientlakeonMarsrecent...
問題詳情:USresearchershavefoundtracesofanancientlakeonMarsrecently,increasinghopesofdiscoveringevidencethatbillionsofyearsagotheRedplanethostedlife.Thelake,whichdatesbacksome3.4billionyears,appearstoha...