Cladosporium sphaerospermum, cultured at the Coimbra University Hospital Centre in Portugal. (Rui Tomé/Atlas of Mycology, used with permission) The Chernobyl exclusion zone may be off-limits to humans, but ever since the Unit Four reactor at the Chernobyl Nuclear Power Plant exploded nearly 40 years ago, other forms of life have not only moved in but survived, adapted, and appeared to thrive. Part of that may be the lack of humans… but for one organism, at least, the ionizing radiation lingering inside the reactor's surrounding structures may be an advantage. There, clinging to the interior walls of one of the most...