The Chernobyl Exclusion Zone accidentally became a thriving wildlife reserve

The 1986 disaster at the Chernobyl nuclear power plant forced the evacuation of more than 100,000 people, creating an exclusion zone dozens of kilometers wide.

Without a permanent human presence, over the following decades the zone unexpectedly turned into one of the richest wildlife ecosystems in Europe — wolves, lynxes, European bison and Przewalski's horses now live there in numbers unmatched by many "normal" reserves on the continent.

It sounds absurd. And yet studies show that for many animal species, the mere presence of even low-level radiation turned out to be less harmful than the everyday presence of people, farming, and infrastructure.

The significance: this doesn't mean radiation is "safe" — individual organisms still show biological effects of the contamination — but it shows just how powerful a degrading force ordinary human presence can be for nature.