The world has moved on since the 1986 catastrophe, but one thing hasn't changed very much: The dead trees, plants and leaves at the contaminated site.
The Polar Star, America's only active polar icebreaker, has been dispatched to Commonwealth Bay Antarctica to free a Russian ship stuck in the ice. How do these huge ships work?
The last of the 26 foreign Greenpeace activists who were detained after an Arctic protest left Russia on Sunday, the group announced, finally ending a saga that had caused global concern.
Russian scientists believe they have found a wholly new type of bacteria in the subglacial Lake Vostok in Antarctica.
A split in the jet stream resulted in northern fires and southern floods last year. But the original cause for the blockage that produced the split remains a mystery.
Meteorologists claim the 2010 mega-heatwave across Russia was not the result of long-term climate changes and should have been foreseen using short-term weather forecasts.
Three generations of Russian scientists have been keeping track of the world's largest and deepest lake and they're finding some surprising climate change connections.