A new study by the Mayo Clinic of 17 patients with lungs injured by vaping finds the cause may be due to chemicals, and not lipids, which are fatty substances such as mineral oil, as has been suspected. Dr. Yasmeen Butt, a pulmonary pathologist at Mayo Clinic in Arizona and one of the lead authors of the study, tells us more.
"Nova" explores new discoveries and how we have come this far on Wednesdays at 8 p.m. on Arizona PBS.
Tired of the daily onslaught of confusing political ads? Hear the candidates make their case in debates that focus on the important issues at stake.
After seven years of marriage, Alan and Celia discover that wedded bliss isn't always blissful. Clashing politics, Alan's new job and a wild local lad create tension. Caroline gets emotionally embroiled at work. Alan's brother visits. See what else unfolds in season four of "Last Tango in Hailfax."