Adam Navis and Liz Waid give a short history of how people around the world get vaccines. We will have to use many of these methods to deliver vaccines that everyone needs – the COVID-19 vaccines. How do you get vaccines?
Joshua Leo and Liz Waid visit the history of Chichen Itza. It was a Mayan city, located in southern Mexico. Why did people abandon this city, once full of life?