The prickly pear cactus - available worldwide - could make clean water for millions. Cheaply, easily, and safely.

A revolutionary new technique based on dolphin echo-location sonar is helping the blind to see and safely navigate on their own - changing lives and bringing new hope.

An intriguing failure in genetic research on twins necessitates a rethink on the origins of disease.

Secrets from genius inventor Nikola Tesla's "mind lab". Explore key techniques for tapping into practical creativity and inspiration for any task.  Was Tesla aware of ancient technology?