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Radio signals from space: Scientists uncover giant radio 'bubbles' in centre of Milky Way | Science | News | Express.co.uk
Earth calling: Tiny yellow dot shows distance radio broadcasts to aliens have travelled | Daily Mail Online
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Star formation drives huge bubbles in the Milky way | Ars Technica
The Earth is at the centre of a cosmic bubble created by supernovae | CBC Radio
A Human-Made "Bubble" of Radio Waves Could Be Shielding Earth From Radiation | Smart News | Smithsonian Magazine
