What happened at Chernobyl?
The upcoming HBO miniseries, which stars Jared Harris and Stellan Skarsgard, is a dramatization of the real events of April 1986.
Journalist Adam Higginbotham, who wrote the recently published "Midnight in Chernobyl," spoke to InsideEdition.com about what happened over 30 years ago in what was then a part of the Soviet Union.
"The Chernobyl nuclear accident was the worst nuclear accident in history and remains even after Fukushima [in Japan] the worst nuclear accident in history," Higginbotham said.
"More radiation was released than has been released by Fukushima, and the scale of the accident, the number of people whose lives were turned over, destroyed or otherwise ruined by the accident dwarfs that of any other nuclear accident," he added.
Check out the video above to learn more.