Alternative cementitious materials able to partially replace or supplement the use of Portland cement, such as geopolymers, are becoming increasingly attractive due to lower emissions of air ...

A mysterious striped signal from the Crab Pulsar may finally be explained by a delicate balance between plasma effects and ...

Melissa Quinn is a senior reporter for CBSNews.com, where she covers U.S. politics, with a focus on the Supreme Court and federal courts. Overseen by the conservative Heritage Foundation, the ...