The observable universe is vast, extending about 93 billion light-years across, containing galaxies, stars, planets, and all of the observable phenomena that make up our cosmic home. But what exists ...

As I watched the nebulae drifting in the dark universe, I suddenly felt bewildered — does the universe actually have a boundary? At that moment, I was holding half a bottle of cola, staring at the ...

Since conventional explanations have failed to pony up dark matter, one physicist is looking towards the unconventional. In a series of two papers, physicist Stefano Profumo of the University of ...