• This American satellite has been examining the microwave radiation generated shortly after the universe began.

    ECONOMIST: The shape of the universe

  • In particular, the second and third harmonics of the microwave radiation are weaker than expected.

    ECONOMIST: The shape of the universe

  • In 1966 Kenneth Greisen, Vadim Kuzmin and Georgiy Zatsepin showed that high-energy charged particles (cosmic rays are mostly atomic nuclei, and thus positively charged) should be slowed by collisions with the photons of the cosmic microwave background (radiation left over from the Big Bang that permeates all space).

    ECONOMIST: Cosmic rays: They came from outer space | The

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