What is red mercury?

Since the 1980s, Russian and US sources have repeatedly claimed that various groups of terrorists are dangerously close to acquiring a mysterious substance known as 'red mercury.' But what exactly is this stuff -- and why can't anyone agree about its chemical makeup, uses, or effects? Tune in and learn why there might be more to the story. Learn more about your ad-choices at https://news.iheart.com/podcast-advertisers