Through the modern science of DNA analysis, they have finally solved a mystery that has been capturing the hearts of millions.
They have found Anastasia and Alexi Romanov which has been proved through DNA matching to their parents and siblings from a grave ~70m away. I've been assuming that the matching sister in Alexi's grave was Anastasia, but it could have been one of his other sisters. The important meaning from this is that all of the Romanov family has been found. This paper in PLOS One has the science behind it (and that the Russians and American's don't agree on which sister was missing).
The mystery that has inspired half a dozen movies can now be laid to rest.