Astronomers propose a new theory to explain Saturn's unusual rings.
Volcanologists keep wary watch on Sicily's restless peak.
A huge galactic smash-up may have formed the galaxies nearest us.
The key to defeating tuberculosis may lie in its longevity.
Use of nitrogen fertilizer is radically impacting Earth's nitrogen cycle.
Astronomers say a black hole recently formed in a nearby galaxy.
Learning to read reorganizes the brain's neural networks—at any age.
A South African site yields evidence of early advancement in our species.