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Radiation levels at the Martian surface appear to be roughly similar to those experienced by astronauts in low-Earth orbit, NASA's Mars rover Curiosity has found.

The rover's initial radiation measurements ? the first ever taken on the surface of another planet ? may buoy the hopes of human explorers who may one day put boots on Mars, for they add more support to the notion that astronauts can indeed function on the Red Planet for limited stretches of time.

"Absolutely, astronauts can live in this environment," Don Hassler, of the Southwest Research Institute in Boulder, Colo., told reporters during a news conference Thursday.

Hassler is principal investigator of Curiosity's Radiation Assessment Detector instrument, or RAD. RAD aims to characterize the Martian radiation environment, both to help scientists assess the planet's past and current potential to host life and to aid future manned exploration of the Red Planet.


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