The roots of Russia's invasion of Ukraine go back decades and run deep. The current conflict is more than one country fighting to take over another; it is — in the words of one U.S. official — a shift ...

Measuring heat flow within multilayer thin films remains a long-standing challenge. Here, authors use ultrafast X-ray diffraction to map heat transport in GaN films, revealing anisotropic flow and ...

Cytological techniques are methods used in the study or manipulation of cells. These include methods used in cell biology to culture, track, phenotype, sort and screen cells in populations or tissues, ...