Aftershocks and triggered earthquakes both follow a large earthquake, and they don’t happen at random. Can lessons about the sequence and timing of quakes improve safety?

Titanic explosion shows one of the biggest bangs since the Biggest Bang, spreads useful elements through the universe. Finally revealed: anti-matter is working for you!

The ozone layer protects Earth from UV rays: Twenty-two years after a treaty to protect ozone, how is the layer doing? What has happened to the ozone hole above Antarctica?

A planet newly found in the southern sky is perilously close to its star, orbiting in less than 1 Earth day. Within 10 years, this planet may force a new understanding of star-guts.

As Earth warms, should we try huge geoengineering projects to cool the climate? Would adding iron to fertilize ocean plants withdraw enough carbon dioxide to slow warming — or backfire?

The “late heavy bombardment” burned out any life that was around 4 billion years ago — or not… Plenty of high temperature bacteria could have survived in deep rocks, says a new study.

Rapid melting of Canadian ice sheet suggests that Greenland’s massive ice cap could melt and raise sea level much faster than predicted within a century.

New analysis uses light to distinguish one diamond from another. Technique may help jewelers, but won’t help the battle against the “conflict diamonds” that are fueling wars in Africa.

The Long Goodbye: 30 years after blast-off, two Voyager spaceships have reached the edge of the solar system. Meet the missions that revolutionized the study of planets and moons.

How do they form? How do we predict their paths? How can we improve predictions?