A new interesting information from a research higlights the difference of genes related to cancer between elephants and humans. 

An estimated 17 percent of humans worldwide die from cancer, but less than five percent of captive elephants -- who also live for about 70 years, and have about 100 times as many potentially cancerous cells as humans -- die from the disease.

https://www.sciencedaily.com/releases/2018/08/180814173643.htm