SummaryThe general public's exposure to radiation due to the meltdowns at the Fukushima Daiichi Nuclear Power Plant in Japan was limited because of prompt evacuations and swift control of the food supply. Nevertheless, Fukushima Prefecture launched a health monitoring program to assure residents and quickly identify any health problems that might result from the accident. As part of this program t
Crunching the numbers to explain cancerWhy do some tissues give rise to cancer in humans a million times more frequently than others? Tomasetti and Vogelstein conclude that these differences can be explained by the number of stem cell divisions. By plotting the lifetime incidence of various cancers against the estimated number of normal stem cell divisions in the corresponding tissues over a lifet
SummaryBert Vogelstein and Cristian Tomasetti of Johns Hopkins University have put forth a mathematical analysis of the genesis of cancer that suggests many cases are not preventable. Drawing on the published literature, they estimated the number of cells in an organ, what percentage of them are long-lived stem cells, and how many times the stem cells divide. With every division, there's a risk of
The general public avoided exposure to high levels of radioactivity, but questions linger about the long-term effects of contamination. Hot job. Technicians check radiation hourly in a gravel lot in Fukushima City. Exposure has dropped but remains 35 times above background. PHOTO CREDIT: D. NORMILE/SCIENCE; GRAPH SOURCE: FUKUSHIMA PREFECTURE FUKUSHIMA, JAPAN—At 5 p.m. sharp, Mitsuru Itou watches a
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