A new project to fill the 1,000-mile exclusion zone with solar panels is expected to be commissioned next month.
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.
Government sites, banks, the postal service, Kiev's airport and the Chernobyl nuclear plant were all hit by the cyberattack.
In a yet to be published paper, Dr. Roberto Lucchini of the World Trade Center Health Program compared the findings of health programs established around the world in the aftermath of major environmental disasters.
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.
Energy minister says the problem should be resolved by Friday.