Oct. 16, 2019: Graffiti May Fill Gaps In A Monument’s History; Dogs And Cancer

In the ruins of ancient buildings near Farmington, New Mexico, the ceilings are covered with historic graffiti. Turns out the inscriptions were left by people who visited the site in the late 1800s. A Cortez historian is studying what they wrote. Then, a veterinarian’s research explores why dogs are at high risk for cancer.