For years, China processed more than half of the world’s plastic recycling. Then, in 2018, it stopped. Things have gotten messy since then.

For years, security experts have warned that white nationalist and white supremacist extremism represent the most significant domestic terrorism threat to the United States. Now, in the wake of the a…

Hip-hop is a phenomenon that has captured hearts around the world. Its musical form ranges from party anthems to critical social commentary. But the genre plays another role: it is an influential sof…

Hosting the Olympics is a monumental undertaking that often leaves behind rusted stadiums and financial losses. So why do nations compete to do it? This episode examines the political history of the …

Militaries around the world are designing artificial intelligence–powered weapons that could one day make their own decisions about who to target. The technology could change the scope of warfare, bu…