The newly detected gravitational wave background could be the result of supermassive black hole binaries that orbit each other for a few million years before merging. By now you’ll have seen the news ...

So much happened in the earliest moments of the universe. Elementary particles appeared, the first nuclei of hydrogen and helium, and fluctuations of energy and matter set into motion the formation of ...

A glow undetectable to the human eye permeates the universe. This light is the remnant signature of the cosmic beginning — a dense, hot fireball that burst forth and created all mass, energy, and time ...

The cosmic microwave background (CMB) radiation is described as an imperceptible universal glow, representing the 13.8-billion-year-old remnant signature of the cosmos's primordial hot, dense origin.

Cosmology’s neat story of a universe driven apart by a simple, invisible “cosmic fuel” is starting to fray. A growing body of ...

Geraint Lewis receives funding from the Australian Research Council including Discovery Projects. He currently holds an Australian Research Council Future Fellowship. Recent observations suggest that ...