Comment Environmental Factors? (Score 4, Informative) 180
The correlation between these parameters suggests that two-thirds of the difference in cancer risk among various tissue types can be blamed on random, or 'stochastic,' mutations in DNA occurring during stem-cell division, and only one-third on hereditary or environmental factors like smoking, the researchers conclude.
The article says,
By “chance” Tomasetti meant the roll of the dice that each cell division represents, leaving aside the influence of deleterious genes or environmental factors such as smoking or exposure to radiation.
The summary says 1/3 has smoking and environmental effects, while the article says the 1/3 doesn't have smoking and environmental effects.
Lately, slashdot summaries have gotten worse and worse and completely change what is being claimed.