Researchers say that fast food and other modern risk factors, such as smoking and a sedentary lifestyle, are not the only reasons people develop cardiovascular(心臓血管の)disease. Upon examining CT scans of 22 mummies, which date as far back as 3,500 years and are housed in the Egyptian National Museum of Antiquities in Cairo, they found that at least 9 had definite or probable hardening of the arteries. One mummy even presented evidence of a possible heart attack, though researchers were unable to determine whether the event resulted in his death.