Caltech Scientists Film Photons with Electrons
Techniques recently invented by researchers at Caltech—which allow the real-time, real-space visualization of fleeting changes in the structure of nanoscale matter—have been used to image the evanescent electrical fields produced by the interaction of electrons and photons, and to track changes in atomic-scale structures.
Caltech Student Project Aims to Help Kids Walk Again
Getting bed-ridden children in hospitals in Third World countries to walk again is not easy. Often, even the best efforts are hampered by limited staff and even more limited rehabilitation equipment. Caltech undergraduate Stephen Wilke got a firsthand look at this situation on a trip to Guatemala last August, and was inspired to start a project to help kids get ambulatory again.
Researchers Revise Long-Held Theory of Fruit-Fly Development
For decades, science texts have told a simple and straightforward story about a particular protein—a transcription factor—that helps the embryo of the fruit fly, Drosophila melanogaster, pattern tissues in a manner that depends on the levels of this factor within individual cells. "For 20 years, this system of patterning has been used in textbooks as a paradigm for patterning in embryos, controlled by transcription factors," says Angelike Stathopoulos, assistant professor of biology at Caltech. Now she and her colleagues have called that paradigm into question, revealing a tale that is both more complicated and potentially more interesting than the one previously described.
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