SA Special Editions

Huge empty areas of the universe called voids could help solve the greatest mysteries in the cosmos

Physicists have new ideas about why the energy of empty space is so much weaker than it is predicted to be

Spacetime may emerge from a more fundamental reality. Figuring out how could unlock the most urgent goal in physics—a quantum theory of gravity

Quantum entanglement and spacetime wormholes helped to solve a long-standing quandary

Mysterious “islands” help to explain what happens to information that falls into a black hole

New insights from black hole research may elucidate the cosmological event horizon

Twenty years after their initial detection, enigmatic blasts from the sky are starting to deliver tentative answers, as well as plenty of science

The first image of the behemoth at the center of our galaxy opens new avenues for understanding the nature of black holes

The AdS/CFT duality conjecture suggests our universe is a hologram, enabling significant discoveries in the 25 years since it was first proposed

If the invisible matter does not appear in experiments or particle colliders, we may have to find it in space

The Archimedes experiment will weigh the void of empty space to help solve a big cosmic puzzle

A quarter of a century after detecting dark energy, scientists are still trying to figure out what it is

Rather than ripping up our fundamental models of the universe, the unexpectedly big and bright galaxies spied in the early universe by JWST probably have astrophysical explanations