Space Junk Threat
NOEL MURPHY:
Space junk threat to earth
26Sep07 -www.geelongadvertiser.com.au
SPACE junk, comets crashing through our atmosphere, extra-terrestrial micro-organisms that survive in appalling cold or searing heat, bacteria that grow more virulent in the gravity-free vacuum of space. What happens when fate conspires to bring such creatures and creations to earth?
We've all seen the B-grade 1950s sci-fi flicks, the Roswell and X-Files conspiracies, wild Chariots of the Gods alien theories, the mysterious Peruvian meteorite illnesses. There's no shortage of speculation of what the future might hold, what with holes in the ozone admitting cosmic radiation and comets, meteorites, space junks _ and all the microscopic hitchhikers they might be carrying _ hurtling towards us at mind-boggling speeds.
Now there's a new kid on the inter-planetary catastrophist's block: superbugs. Super spacebugs. Scientists working on and with the space shuttle have found certain bugs, dangerous enough when earth-bound, will grow more powerful in space. Like salmonella, which acts differently, genetically, in space, making it stronger, more deadly.
Arizona State University's Centre for Infectious Diseases and Vaccinology has found space salmonella, after 12 days, killed mice more swiftly and exhibited genetic variations. Space evidently triggers a different response in the bacterium even if scientists insist it's nothing it can't do on earth given the right circumstances.
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