Abstract:

In the last 15 years of observations we have ruled out the simplest new physics origins for cosmic acceleration. We have also learned much better what questions to ask and what data is needed to answer them. I discuss recent trends useful for theorists and observers, including ideas tied closely to gravity and particle physics, and complementarity between supernovae, large scale structure, and CMB surveys. Presenting new calculations on what is the strongest path to further progress within the next 5 years, I see the chase closing in more quickly than previously thought.