This rainforest tree solved one of evolution’s hardest problems. Here’s how it evolved to use tension and geometry to fire ...

CLAIRTON, Pa. (AP) — An explosion at a U.S. Steel plant near Pittsburgh left two dead and sent at least 10 to hospitals Monday and heavily damaged the sprawling facility, officials said. One worker ...

Scientists have discovered a tropical “dynamite tree” that explosively launches seeds at 150 mph. The mechanism uses physics, ...

An explosion at a U.S. Steel plant south of Pittsburgh killed two people and injured more than 10 others. The CEO has vowed to find out what caused Monday's blast while the workers' union says it will ...

HARRISBURG, Pa. — The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long ...

Add Yahoo as a preferred source to see more of our stories on Google. CLAIRTON, PA − Officials confirmed a second fatality in the steel plant explosion on the outskirts of Pittsburgh on Monday that ...

A portion of the Clairton Coke Works, a U.S. Steel plant, is seen on Monday in Clairton. An explosion at the plant near Pittsburgh left one person dead, another missing and sent at least 10 to ...

HARRISBURG, Pa. (AP) — The fatal explosion last week at U.S. Steel's Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a ...