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?
Adam Navis and Katy Blake look at how people throughout history have worn masks. These small pieces of cloth have been a part of culture for a long time.
Countries and organisations all around the world use flags. These flags communicate their identity. Bruce Gulland and Liz Waid look at the history of flags and their uses today.
Liz Waid and Bruce Gulland look at a magical creature - the unicorn! Did unicorns really exist?
Christy VanArragon and Joshua Leo look at the history and future of paper - one of the most important materials in history.