Comment by TheSpiceIsLife

Wasn't there some news recently that sleep deficiency is positively correlated with heart disease?

Something like this http://www.nhs.uk/Livewell/tiredness-and-fatigue/Pages/lack-...

There was also some news recently that working in a place that grinds coffee causes lung cancer http://www.npr.org/sections/thesalt/2016/04/15/474325037/cof...

Probably if the sabre-toothed tiger gets you before the age of 35 you won't get cancer or heart disease. But if you live long enough and the cancer doesn't kill you the chemotherapy will.