Asia

Science, Tech & Environment

Saving the sharks

Sharks may be fearsome predators, but over fishing threatens their survival. The World's Julia Kumari Drapkin profiles an unusual pair of shark researchers. One has always wanted to protect sharks. The other used to kill them.

Science, Tech & Environment

Toilet Tales: Water and Waste

The humble flush toilet is a technological wonder that carries our waste safely away from our homes and workplaces. Yet roughly 2.5 billion people don’t have access to decent sanitation. And even for those who do, the toilet is an imperfect solution that often creates problems of its own. The World’s special five-part series “Toilet Tales: Water and Waste” examines efforts to solve those problems around the world, from China to India to Haiti to Cambridge, Massachusetts.