It has been nearly 27 years since the meltdown at Chernobyl, the world's largest nuclear accident, yet the area still has pockets of surprising radioactivity.
There may be no better evidence of this than a YouTube video produced by Carl Willis, a nuclear engineer with a delightfully disconcerting hobby: poking around radioactive sites with a Geiger counter and documenting his encounters. In a video from 2011, Willis explores Chernobyl’s Number 5 reactor, eventually finding a “hot spot” he traces down to a tiny speck no larger than a grain of salt.
