 
        The Hidden Engineering of Niagara Falls
 
        Why Some Roads Are Made of Styrofoam
 
        The Bizarre Bases of Antenna Towers
 
        Connecting Solar to the Grid is Harder Than You Think
 
        How Bridge Engineers Design Against Ship Collisions
 
        The World's Most Recycled Material
 
        Why Locomotives Don't Have Tires
 
        How To Install a Pipeline Under a Railroad
 
        Why Bridges Don't Sink
 
        How the Hawaiian Power Grid Works
 
        Why Are Rails Shaped Like That?
 
        Why Spillway Gates Don't Rust Out
 
        How Water Recycling Works
 
        The Fluid Effects That Kill Pumps
 
        Why are Smokestacks So Tall?
 
        Which Is Easier To Pull? (Railcars vs. Road Cars)