[Alan McDougall (OP)]

http://www.theepochtimes.com/n3/2086401-universe-expanding-faster-than-expected/

Astronomers have obtained the most precise measurement yet of how fast the universe is expanding, and it doesn’t agree with predictions based on other data and our current understanding of the physics of the cosmos.

The discrepancy—the universe is now expanding 9 percent faster than expected—means either that measurements of the cosmic microwave background radiation are wrong or that some unknown physical phenomenon is speeding up the expansion of space, the astronomers say.

[chris]

That's a very well-written article, and an interesting observation. Although the fact that the authors themselves cannot explain it argues that we probably won't get an answer here! They speculate that there may be errors in the measurements of the cosmic microwave background radiation, or  another neutrino we don't know about is responsible.