Historian Lisa Vox argues for finding a way to address the threats that face us all. It starts, she says, with not condemning others for holding a different worldview.

Technology gives us access to the universe while at the same time creating risks to our continued existence. Does humankind’s best hope for long-term survival come down to leaving Earth behind?

The chief engineer for NASA’s robotic Mars Exploration Program talks about what it would take to put people on the Red Planet. Will Mars be humanity’s lifeboat?

Mexico City is one of the world’s biggest population centers, yet the city’s infrastructure is extremely unstable. The resulting challenges serve as a warning—and a lesson—to the rest of our urbanizing world.

From genes to geophysics, our world is increasingly what we make it. But environmental philosopher Christopher Preston urges restraint.

If our reliance on technology has accelerated climate change, maybe technology can fix the problem too. Would it work? Should we try it?

Why does America’s Christian Right take such an active interest in how we view and use scientific findings—to the point of creating its own version of science?

Immortality may not be an option, but can degeneration and the terrors of aging be lessened or even eliminated? These authors think so.