Forget smoking, sunburns, infections, and bad diet: two-thirds of cancers are due to “bad luck.” That was the takeaway—and subsequent media headlines—from an article published in Science last year by researchers at Johns Hopkins Unversity.
Fast forward several months and another study looking at the same question came out in Nature with the opposite conclusion: lifestyle and other external factors account for over 70% of most cancers.
Two big name journals. Two different conclusions. So which is right? What should be the new takeaway?