On Mars, Earth probably looks like a pinprick in the sky, a bluish-green ball some 140 million miles away. But before astronauts can glimpse the view from the red planet, doctors must better understand how to handle medical problems and surgeries in space.

Now preliminary findings from a University of Florida (UF) study show there is little difference in the dose of general anesthesia needed to anesthetize patients in weightless or normal gravity environments. It's a major step forward, but just one of many hurdles researchers face in trying to establish proper medical protocols in space, ...

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