Hydrogen is the most abundant element in the universe. It makes up 75% of it, in fact. It is a key ingredient in the water that covers 71% of the Earth. In a few years, it might power our cars and our homes. However, scientists...

Manoj Bhargava, founder of the humanitarian organization Billions in Change, once said, “There are seven billion of us in the world today. And we're facing some huge problems, but talk doesn't help someone out of poverty. Awareness...