Since the discovery of planetary nebulae in the late 1700s, astronomers have learned that these expanding shells of glowing ...

Penn materials scientist Shoji Hall and colleagues have found that manipulating the surface of water can allow scientists to ...

A derivative of the metal-organic complex ferrocene has 20 valence electrons in a stable configuration, overturning the ...

Proteins are life's molecular workhorses, doing everything from turning sunlight into food to fighting viruses.