Bit erroneous.
They've found a few 'ancient' skeletons with evidence of cancer, but the vast majority of cancers present today generally hit older people and people simply didn't live that long back then.
Study seems awfully simplistic.
They also fully acknowledge that they've found cancer in Egyptian mummies. Yet claim it's a modern illness. Er.
Have just noticed that it's a 6 year old study. Other people saying "wait. Wtf? That doesn't make any sense" is probably why it's been ignored.