If the prions do not reproduce in culture, they could pass any quarantine test applied to a sample returned from Mars or from another planet and they could still infect the scientists that breath them in. With an incubation period of 10 years, perhaps a lot of people could become infected by such a form of exogenous life before we notice any symptoms. By then it could be too late. Perhaps we have mined that stuff and brought tonnes back to Earth and everyone breathed it in and then all we can do is wait for the incubation period to pass (remember that you cannot test a live brain for Creutzfeldt–Jakob disease, only after its death).
Then the zombies win...
You can also subscribe to receive e-mail alerts about probable Northern Lights.
From the website: "AuroraWatch forecasts are made by examining the behaviour of the Earth's magnetic field strength, which is measured by ground-based magnetometers."
With the beta version of openSUSE 11.1, which I am now testing, I can get even the touch screen mode of my MultiTouch tablet working. Add to it the 3D desktop effects and it blows everyone out the window!