Injectable DNA medibots that could diagnose and treat cancer lead off this week's news. Other articles focus on how the noise created by whale watchers might disturb orcas, fire use in the early Stone Age, an association between dental X rays of pregnant women and low-birth-weight babies, measurements of an electron's weak charge, and identification of chemicals in coffee, tea, spices, and wine that may fight diabetes. Food for Thought reports that tea drinking appears to seed the body with compounds that retard the growth of prostate cancer. MathTrek counts on Fibonacci numbers.
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