anonymous scientist bionerd has attracted thousands of subscribers to her youtube channel for her visits into the chernobyl exclusion zone .
the site of a devastating nuclear explosion 29 years ago on april 26 , 1986 , as she measures the high levels of radiation still lingering in the air .
the site has been closed off to the world , with ukrainian scientists agreeing that the area is n't habitable for humans for at least 20,000 years that