In recent years, theories of global upheavals have become respectable again.

The real concern is saving ourselves and preventing global political upheaval.

This was also a time of global upheaval as the World-continent of Pangea began to break up.

Even more nervous types might say there would be global upheaval.

In our own time, of course, there were the wars in the Balkans and the gulf, followed by the global upheaval triggered by 9/11.

The almost imperceptible rate of growth in the world's second-largest economy was its worst performance since 1974, when soaring oil prices provoked a global economic upheaval.

Czech Cubism was a Richter index of global cultural upheaval.

With global economic upheaval, concern over federal spending is front and center.

These global upheavals have been seen before, but not with Hubble's sharp resolution.

These higher-quality Hubble images may help astronomers understand how such global upheavals develop on Jupiter.