An American NGO sterilized about 400 stray dogs and cats that live around the former nuclear power plant.
The head of Russia's Radiation, Chemical and Biological Protection Troops says the new robots will be better equipped than people to operate in deadly environments.
The Russian president called the disaster “a harsh lesson to humanity.”
On April 26, 1986, a botched test at the nuclear plant in then-Soviet Ukraine triggered a meltdown.
Wolves, foxes and other mammals abound in contaminated areas.
Greenpeace tests show overall contamination from key isotopes has fallen somewhat, but lingers, especially in places such as forests.
A new study suggests that humans are worse for animal populations than nuclear disasters.
A documentary that premiered at Sundance sheds an eerie light on a possible cause for the Chernobyl nuclear disaster.