Are primordial black holes really giant gravitinos?

Paul M. Sutter is an astrophysicist at SUNY Stony Brook and the Flatiron Institute, host of Ask a Spaceman and Space Radio, and author of How to Die in Space. He contributed this article to’s Expert Voices: Opinions and Insights. Astronomers don’t understand the origins of the biggest black holes in the universe. These […]

Primordial black holes and the search for dark matter from the multiverse

Fig1. Baby universes branching off of our universe shortly after the Big Bang appear to us as black holes. (Credit:Kavli IPMU) The Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) is home to many interdisciplinary projects which benefit from the synergy of a wide range of expertise available at the institute. […]

Identifying primordial ripples would be key to understanding the conditions of the early universe — ScienceDaily

In the moments immediately following the Big Bang, the very first gravitational waves rang out. The product of quantum fluctuations in the new soup of primordial matter, these earliest ripples through the fabric of space-time were quickly amplified by inflationary processes that drove the universe to explosively expand. Primordial gravitational waves, produced nearly 13.8 billion […]

Swarms of ‘primordial’ black holes might fill our universe

The universe might be full of tiny, ancient black holes. And researchers might be able to prove it. These mini black holes from the beginning of time, or primordial black holes (PBHs), were first dreamed up decades ago. Researchers proposed them as an explanation for dark matter, an unseen substance that exerts a gravitational pull […]