 Currently, his interests center on cosmology, including measurement of the cosmological parameters, the exploration of the nature of the "dark energy" and the large-scale distribution of matter in the universe.His current cosmological studies focus on the use of Type Ia supernovae as tools for determining the cosmological parameters, through his participation in the Supernova Cosmology Project.He is now the primary investigator of the Nearby Supernova Factory experiment, and is also a co-investigator on the Supernova/Acceleration Probe.