Asteroids
        
          
            MIT unveils simulation to help stop an asteroid impact        
        
        
            MIT has developed a simulation to determine the most appropriate way to stop an asteroid impact if one of the space rocks is headed toward the Earth.        
        
    
        
          
            What a controversial asteroid mission tells us about US space policy        
        
        
            Billions spent on projects of questionable benefit - like the plan to capture an asteroid - raises the question:...