A Simple Concrete Bridge That Could Save America's Wildlife

Michael Van Valkenburgh Associates win a design competition for an animal crossing that could help solve our $8 billion roadkill problem. By Suzanne Labarre

Ingenious Flipper Bridge Melds Left-Side Drivers With Right-Side Drivers

Hong Kong drives on the left side of the road, mainland China on the right. So how do you prevent crashes when driving between them? By Suzanne Labarre