Most Active Stories
- The Louisiana Coast: Last Call — The Shape We're In Now
- The Louisiana Coast: Last Call — How We Got This Way: The Mississippi River
- Bring Your Own Presents: 'Virginia'
- Dirty Diapers Pile Up In Portland Recycling Bins: 'It's Not Pretty'
- As With Dalai Lama Today, Pope's Visit To New Orleans 25 Years Ago Came Amid Violence
Fri March 23, 2012
Alan Alda Asks Scientists "What Is A Flame?"
At age 11, actor Alan Alda asked his teacher what a flame was. He received a confusing answer: "oxidation." In the spirit of better communicating science, he's created the "Flame Challenge," a contest in which scientists do their best to define a flame. Eleven-year-olds from around the world will judge the entries.