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radiation

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right now it's the biggest challenge

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we'll have to overcome on our journey to

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mars earth's magnetic field protects us

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from cosmic radiation but once we travel

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beyond that threshold all bets are off a

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round trip mission to mars will take up

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to three years so that could mean up to

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three years of constant exposure to

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space radiation this level of exposure

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creates potential long-term health risks

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dna damage decreased cognitive ability

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long-term cardiovascular health problems

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and even the possibility of developing

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certain kinds of cancers

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but we're working to minimize these

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risks today aboard the international

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space station we're using new sensors to

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improve our knowledge of cosmic

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radiation

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and back on earth we're working on ways

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to optimize shielding for future

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spacecraft

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we're going to mars it won't be easy but

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because of the research we're doing

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today on the ground and aboard the