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?

Construction matters. Hundreds of millions live and work in houses and schools that will collapse in the next earthquake. Chile and California prove that smart engineering saves lives.

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

New shark repellent tested. How common are shark attacks? Meet the social shark. Learn why some people are fascinated by this cold-blooded killer.

Tornadoes kill 60 Americans each year. How do we predict tornadoes? How do we make houses safer? Where do tornadoes get their energy?

Atlantic Ocean releases giant bubble of hydrogen sulfide gas near Namibia, tracked for first time from space.

West Antarctic Ice Sheet may be thickening, which could reduce the rise in sea level caused by global warming.

How is lightning generated? How does it affect the body? How can you stay safe? And what does lightning look like from space?

Fungus that caused Irish potato famine is back, threatening potato crops around the world. How did the blight change world history, and what is being done to prevent another blight?

The Edmund Fitzgerald went down in 1975 with barely a trace, and no warning call whatsoever. New evidence pins the blame on terrible weather.