Investment magnate Warren Buffett has famously suggested that investors should try to "be fearful when others are greedy and greedy only when others are fearful." That turns out to be excellent advice, according to the results of a new study.
Building on previous studies targeting the amygdala, a team of researchers has found that some brain cells recognize emotions based on the viewer's preconceptions rather than the true emotion being expressed.
Caltech researchers Ahmed Zewail and Ulrich Lorenz describe how they visualized and monitored the flow of molten lead within a single zinc oxide nanotube in real time and space using a new imaging technique called four-dimensional electron microscopy.
Caltech researchers at the Joint Center for Artificial Photosynthesis have devised a way to protect technologically important semiconductors from corrosion even as the materials continue to absorb light efficiently.