Celebrate Earth Day by considering the ways you can address climate change at home, with practical advice from a scientist who's seen its effects around the world. Then hear from a culinary historian about the crops, farm animals, and agricultural traditions that we risk losing in America. And...

We admire the seafaring prowess of the Polynesians and hear how a cultural faux pas led to Captain James Cook's fateful encounter with 18th-century Hawaiians. Then tour guides from Athens and Thessaloniki recommend attractions to visit in northern Greece, and The New Yorker’s "Comma Queen," Mary...

We learn some surprisingly useful Italian phrases from one of Italy's most popular newspaper columnists, then consider why certain places have fostered more than their share of world-changing innovations, and hear about Timbuktu's history as an important center for scholarship. Plus, we find out...