How do you think the world changed? Why?

global, novel virus that keeps us contained in our homes-maybe for months-is already reorienting our relationship to government, to the outside world, even to each other. Some changes these experts expect to see in the coming months or years might feel unfamiliar or unsettling: Will nations stay closed? Will touch become taboo? What will become of restaurants?

But crisis moments also present opportunity: more sophisticated and flexible use of technology, less polarization, a revived appreciation for the outdoors and life's other simple pleasures. No one knows exactly what will come, but here is our best stab at a guide to the unknown ways that society-government, healthcare, the economy, our lifestyles and more-will change.

Earth and its atmosphere are continuously altered. Plate tectonics shift the continents, raise mountains and move the ocean floor while processes not fully understood alter the climate. Such constant change has characterized Earth since its beginning some 4.5 billion years ago.