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"Those signals seem to inspire the healthy cells to mutate, thereby causing additional tumours or cancers," he added.The findings, published in the journal Scientific Reports, effectively doubled the cancer risk for a human mission to Mars."Exploring Mars will require missions of 900 days or longer and includes more than one year in deep space where exposures to all energies of galactic غير مجاز مي باشدmic ray heavy ions are unavoidable," said Francis Cucinotta, a researcher at the University of Nevada, Las Vegas in the US.The findings show a tremendous need for additional studies focused on غير مجاز مي باشدmic ray exposures to tissues that dominate human cancer risks, and that these should begin prior to long-term space missions outside the Earth's geomagnetic sphere.

غير مجاز مي باشدmic rays, such as iron and titanium atoms, heavily damage the cells they traverse because of their very high rates of ionisation.. This is based on studies at high doses where all cells are traversed by heavy ions one or more times within much shorter-time periods than will occur during space missions.Conventional risk models used by NASA and others assume DNA damage and mutation are the cause of radiation cancers. Previous studies have shown the health risks from galactic غير مجاز مي باشدmic ray exposure to astronauts include cancer, central nervous system effects, cataracts, circulatory diseases and acute radiation syndromes."We learned the damaged cells send signals to the surrounding, unaffected cells and likely modify the tissues' microenvironments," he said