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…

Fresh water is more than just a resource, it is the source of all life. But in many arid regions of the world, water supplies are under pressure from climate change, and outdated rules and infrastruc…

Projections show that by 2050, Africa’s population will double. By 2100, one in three people on Earth will be African. This means that, by the end of the century, sub-Saharan Africa—which already has…

Successful vaccine rollouts in the United States and other wealthy nations have made many people hopeful that the end of the COVID-19 pandemic is in sight. But the majority of the world’s population …

A U.S. president can launch a first-strike nuclear attack at any time and, according to the law, does not need to seek advice first. Some experts think that’s too much power to put in one person’s ha…