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