Why does Earth need an asteroid-deflection test? Queen guitarist Brian May, ESA astronaut Luca Parmitano, UK Astronomer Royal Sir Martin Rees and Canadian astronaut Chris Hadfield share their thoughts
Why does Earth need an asteroid-deflection test? Queen guitarist Brian May, ESA astronaut Luca Parmitano, UK Astronomer Royal Sir Martin Rees and Canadian astronaut Chris Hadfield share their thoughts
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