New theories on dark matter’s origins point to ‘mirror world’ and universe’s edge
Two recent studies speculate a natural emergence of the mysterious substance, offering ‘self-contained and calculable scenarios’
Physicist David Williams elected Fellow of American Physical Society
UCSC Newscenter — The APS citation for Williams recognizes him “for contributions to the study of gamma rays from extragalactic sources such as gamma-ray bursts and blazars, for using gamma-ray data to test cosmological models of the extragalactic background light, and for leadership in the development of past, present, and future ground-based gamma-ray telescopes.”