Insight Video: More and more people are streaming into the world’s cities, magnifying already serious issues such as pollution, waste management and disease. What should we expect in the coming decades?

Synthetic chemicals have become embedded in all aspects of our lives. What will it take to reverse their toxic effect—on our bodies and on our world?

The food we produce today could adequately feed the world, yet we throw it away by the tons. Not only do millions go hungry as a result, but our wastefulness has a direct environmental impact.

David Hulme interviews Australian science writer and author Julian Cribb about what it will take for the human race to make it through this century.

With the world’s number-one virtual currency so much in the headlines and yet so little understood, it’s a good time to look at its origin, volatile price—and surprising environmental implications.

What happens when critical technology fails? Engineering physics professor Peter Townsend speaks with Vision publisher David Hulme.

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

Neurobiologist Michael Fossel explains how people’s healthy life spans can be extended and how he believes Alzheimer’s will soon be cured.

In an age when human survival seems to be hanging in the balance, cosmologist Martin Rees speculates on our collective future.