Obesity and cancer third most important risk factor for cancer in the United States, just behind tobacco and diet (see Figure). Obesity is the source of about 15% of all preventable cancers. In 2018, Chinese researchers performed a systematic review and comprehensive quantitative meta‐analysis of cohort studies reporting body mass index (BMI) and the risk of 23 cancer types, providing epidemiological evidence supporting the association between BMI and cancer risk. The strongest positive association between BMI and cancer risk was found among patients in North America. The mechanisms by which obesity may increase the risk of cancer are not well understood, but it
Regio Patalis the habitability of lands under the Torrid Zone and Tropic of Capricorn, D'Ailly drew on the "Opus Majus", written around the year 1267 English monk and scholar Roger Bacon. With regard to the "Regio Patalis," Bacon said: “the southern frontier of India reaches the Tropic of Capricorn near the Region of Patale and the neighbouring lands which are washed by a great arm of the sea flowing from the Ocean”. Patala was on or just south of the Tropic of Cancer, not south of the Equator, but somehow Roger Bacon had confused the Tropic of Capricorn with the Tropic of