Ukraine

Nuclear meltdowns at power plants in Chernobyl and Fukushima were the most devastating in recent history.

This is the first time that fixed-wing drones were used for radiation mapping.

What might be passed over as two oddly shaped rocks are the work of Stone Age artisans who sculpted the rocks into beady-eyed snake heads, archaeologists have found.

The current geopolitical chess match in Crimea and Ukraine shines a bright light on NATO (the North Atlantic Treaty Organization) and its historical role as a counterweight to Russian aggression.

In the ongoing international showdown between Russia and Ukraine, the region known as Crimea has emerged as the top prize — a position it has held, for better or worse, for millennia.

Scientists weigh in on safety, and attraction, of Chernobyl vacation spot.