Drone survey of Chernobyl's 'Red Forest' reveals radioactive hotspots

It's been 33 years since Chernobyl nuclear power plant exploded in meltdown spreading nuclear fallout surrounding the area. A lot has changed, but the surroundings still have some of the most radioactive patches in the world. And now researchers have mapped that radioactivity in a detailed drone survey of a fraction of the exclusion zone and uncovered shocking hotspots local authorities had no idea existed.