To Dye For
Kelli Caldwell is using an abandoned lot in West Philadelphia to grow an unusual garden, one that provides the raw materials for her dyes.
Colors Run Riot
Ever had trouble matching an outfit? Discover how color consultants solved a problem created by chemistry.
In exile, Navajos created new designs for their rugs and blankets using the new synthetic dyes.
How Philadelphia’s Water Pollution Problems Shaped the City
The way the city tackled its water pollution problems has made it an unexpected pioneer.
Nor Any Drop to Drink
An archives collection at the Science History Institute gives a glimpse of Americans’ early efforts at desalination, a technology that nations around the globe have come to depend on.
Pipe Dreams: America’s Fluoride Controversy
How did a seemingly benign chemical and a near-miraculous public-health initiative spark decades and decades debate?