Science Feb 12 Watch 5:26 This super strong concrete could repair aging bridges. Here’s what’s standing in the way There's a dire need to repair aging infrastructure in the U.S., and an innovative building material could be a game changer. Embedded with steel fibers, ultra-high performance concrete is about five to 10 times stronger than standard concrete -- and… By Cat Wise
World Sep 18 Watch 7:25 In Cambodia, sand mining is big business — but it comes at a price Sand mining accounts for 85 percent of all worldwide mineral extraction, a $70 billion industry. In Cambodia, the practice is big business -- but it comes with a price. The country relies upon the Mekong River for commerce and transportation,… By Fred de Sam Lazaro, Sarah Clune Hartman
Science Sep 06 Watch How Has Skyscraper Design Changed Since 9/11? The collapse of the Twin Towers served as a stark and stunning reminder to architects and engineers of the value of using concrete to protect skyscrapers from the ravages of fire. Miles O'Brien reports on how the design of skyscrapers…
Sep 17 Watch Minneapolis Bridge Reopens Following Last Year’s Deadly Collapse Thirteen months after a bridge collapse killed 13 people in Minnesota, a new 10-lane structure reopens to traffic Thursday morning. Fred de Sam Lazaro reports on the engineering behind the I-35W's multi-million-dollar reconstruction. Continue watching