Space is getting crowded. The biggest challenge is space junk—the debris that results when satellites break up or get shot down. If we aren’t careful, space junk, and space conflict, could cause a lo…

For years, large corporations have exploited international tax laws to pay less taxes. But last year, 137 countries backed a potential solution: a 15 percent corporate tax applied regardless of a com…

The world is already witnessing the effects of climate change. One inescapable and irreversible consequence is sea-level rise, which could destroy coastal cities. How will the world adapt to rising t…