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Massive Gamma Ray Bubbles Discovered In Milky Way 115

An anonymous reader writes "Two huge, mysterious gamma ray-emitting bubbles have been discovered at the center of the Milky Way galaxy, US astronomers said... The structure spans more than half of the visible sky, from the constellation Virgo to the constellation Grus, and it may be millions of years old."

I have a theory that it's impossible to prove anything, but I can't prove it.