不骗你，《nature》杂志上的

http://www.nature.com/news/how-elephants-avoid-cancer-1.18534

How elephants avoid cancer

Elephants have evolved extra copies of a gene that fights tumour cells, according to two independent studies^1, 2 — offering an explanation for why the animals so rarely develop cancer.

Why elephants do not get cancer is a famous conundrum that was posed — in a different form — by epidemiologist Richard Peto of the University of Oxford, UK, in the 1970s³. Peto noted that, in general, there is little relationship between cancer rates and the body size or age of animals. That is surprising: the cells of large-bodied or older animals should have divided many more times than those of smaller or younger ones, so should possess more random mutations predisposing them to cancer. Peto speculated that there might be an intrinsic biological mechanism that protects cells from cancer as they age and expand.

所有跟帖： 

• 照这样大胖子应该不容易得癌症 -唯一2005- ♀ (0 bytes) () 01/14/2016 postreply 18:38:52

• 大胖子没大象的基因也不行啊 -王伍- ♂ (0 bytes) () 01/14/2016 postreply 18:39:54