Receive emails about upcoming NOVA programs and related content, as well as featured reporting about current events through a science lens. Our first question was about the concept of molecular ...

In a standard biology textbook, cells tend to look more or less the same from all sides. But in real life cells have fronts and backs, tops and bottoms, and they orient many of their structures ...

Students learn how to predict the shape of a molecule based on the electron dot diagram. Covalent Bonds: Students learn how to predict the shape of a molecule based on the electron dot diagram and to ...

An electron microscopy study revealed key details of actin filaments, which are essential structural elements of cells and muscles. Actin filaments -- protein structures critical to living movement ...

Scientists have created permeable thin, microporous films to separate molecules by cross-linking cyclodextrins — sugar-based organic molecules. The films can be used to make a filtration membrane that ...