From snail shells to bird feathers to the changing skin of a chameleon, nature uses colors in ways that range from the electric blue of a poison dart frog's warning to the invisible ultraviolet patterns of flowers that call bees to pollinate.
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Nearly 150 years ago, the Tanzanian city of Dar es Salaam was known by another name - Mzizima, meaning 'healthy town' in the local language. But over the decades, the city and the country of Tanzania have experienced mounting challenges to that health.
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'We've been in a slow-motion train wreck … and now it's just a train wreck.'
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Massachusetts General Hospital (MGH) researchers are investigating a new approach to gene therapy for brain tumors - delivering a cancer-fighting gene to normal brain tissue around the tumor to keep it from spreading. An animal study described in the journal Molecular Therapy, the first study to test the feasibility of such an approach, found that inducing mouse brain cells to secrete human interferon-beta, a protein, suppressed and eliminated growth of human glioblastoma cells implanted nearby.
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Paul W. Goldhaber, dean of the Harvard School of Dental Medicine (HSDM) for 22 years, died this past July 14 from complications of pancreatic cancer. He was 84. While dean, from 1968 to 1990, Goldhaber chartered a new course for dental education, overseeing major changes in the School's dental curriculum and playing a major role in creating what he called 'the era of enlightenment' in teaching and clinical practice. HSDM Dean Bruce Donoff said of Goldhaber, 'He was truly a giant in the field of dental education and research. He firmly believed that science and discovery and research should be part of dental practice and dental education.'
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