polymethylmethacrylate particles with added linear polystyrene [@poon_review].

We used light scattering to study the structure of colloids by measuring the static structure factor (SSF), $S(q)$, which is effectively the Fourier transform of the pair correlation function. Dynamic light scattering was used to obtain the normalized collective dynamic structure factor (DSF), $f(q,\tau)$, which measures the time correlation of particle density fluctuations at wave vector $q$ after delay time $\tau$. Our results agree in broad outline with previous experimental studies and the trends predicted by MCT, while the detailed nature of our study and the very wide time window of our measured DSFs (11 orders of magnitude) together shed new light on the nature of the re-entrant glass transition in sticky hard spheres. Preliminary reports of some of these data have been given before [@reentrantGlass; @unsticking].

Experimental methods
====================

Sample preparation
------------------

The colloidal particles used in this study were poly-methylmethacrylate (PMMA) spheres sterically stabilized by chemically-grafted poly-(12-hydroxystearic acid) (PHSA) dispersed in [*cis*]{}-decalin [@PMMAmaking]. The solvated PHSA, approximately 10nm thick, produces a nearly-hard-sphere interaction between the colloidal particles [@auer]. The particle radius, $R=202$nm, was determined from the lattice spacing of the crystal phase at fluid-crystal coexistence, taking the crystal to be at 