By the start of World War II, many types of weapons had been invented around the world - ones that were devastating and terrifying. However, even in the 20th century, there were still people who didn’t think those sorts of power were enough.
In search of even deadlier mechanisms, they turned to nature itself. And today, we’ll tell you how, for years, the world lived under the threat of the spread of the most merciless weapons: biological ones.
