MIT engineers developed a way to make clean ammonia, without fossil-fuel-powered chemical plants, using the Earth as a geochemical reactor, producing ammonia underground.

With ARPA-E funding, MIT Assistant Professor Iwnetim Abate aims to stimulate natural hydrogen production underground, potentially unearthing a new path to a cheap, carbon-free energy source.

We write to express our alarm over recent trends in K-12 mathematics education in the United States. All of us have first-hand experience of the role that clear mathematical thinking has played in advancing information technology and American economic competitiveness. We all also share the urgent