Health Apr 03

WATCH: Your questions about COVID-19, answered by a doctor

Dr. Ranit Mishori , a professor of family medicine at Georgetown University School of Medicine and Senior Medical Advisor to Physicians for Human Rights, and PBS NewsHour's William Brangham answer your questions about COVID-19 and what we know so far.

Economy Mar 26

Why do we tip?

Some people tip to show off. Some people tip to help the server. Others tip out of a sense of duty. Michael Lynn of Cornell University's School of Hotel Administration weighs in on the psychology behind tipping in America.