As archaeologists we try hard to communicate our insights to a wider public,whether through lucid writing, as exemplified by Brian Fagan's many books,or increasingly through technology such as a 60-second YouTube video. Butour subject runs away from us, and our audience, as it gets ever moretechnical. A century ago, discussion of the chronology of Stonehenge reliedon everyday language to describe the order in which the stones were put up;now it depends on Bayesian statistics applied to calibrated radiocarbondates (Parker Pearson et al.2007). How many practisingarchaeologists understand that well enough to explain it lucidly in 60seconds? Or really understand it at all?