In a disappointing conclusion, joint analysis of the BICEP2 data with data from Planck has shown no evidence of gravitational waves in the early Universe.
The BICEP2 result from last year appeared to show concrete evidence, but a polarization map recently released by Planck showed that the area of sky under analysis had far more dust in than previously thought. Polarized emission from this dust must be taken into account, and when it is, the BICEP2 result sadly disappears.
While disappointing, this does show the scientific process in progress: new evidence turns up, disproves earlier theories and results, and these are then updated. It is not about proving things "wrong", rather, it is a constant quest toward being ever-more "right".
Despite earlier reports of a possible detection, a joint analysis of data from ESA’s Planck satellite and the ground-based BICEP2 and Keck Array experiments has found no conclusive evidence of primordial gravitational waves.