Just 30,000 years after the Big Bang, the universe started singing. Vast soundwaves rang out and expanded through the primordial cosmos, their ripples determining the universe's large-scale structure. And this all fits perfectly with one particularly theory of dark energy.
Two newly-discovered white dwarf stars exhibit extremely odd properties, almost resembling planets. Their dense cores are exposed, shrouded in a layer of oxygen. Are these dying stars potentially habitable?