As I understand the news, BICEP2 has observed the effect of primordial gravitational waves in the cosmic microwave background, which is equivalent to a first glimpse of the GUT scale and in fact (indirectly) even quantum gravity (for more about it click here and there).
Or it has seen some instrument error(s) ...
added later: Lubos has a first evaluation of what it all means (assuming the observation is real) - just another example why I keep reading his blog 8-)
And this blog post has more about some issues with the reported data.
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