European countries, especially the Baltic states of Estonia, Latvia and Lithuania, have confronted Russian disinformation campaigns for decades. Their experience may offer useful lessons as the US joins the battle.
Ukraine on Friday banned Russian men of combat age from entering the country, a move introduced under martial law after Russia fired on and captured three Ukrainian naval ships off Crimea last weekend.
Ukraine on Monday imposed martial law for 30 days in parts of the country most vulnerable to an attack from Russia after President Petro Poroshenko warned of the "extremely serious" threat of a land invasion.
One of the many tensions in Ukraine has been over language. Ukrainian used to be considered the language of peasants, while Russian was the language of the educated. This story from our archives shows how the push-pull between Russia and Ukraine has been going on for many decades.
The rising price of oil and the growing demand for energy has prompted a new look at nuclear power -- even in the oil-rich Middle East, but there are limits to how fast nuclear energy can grow to meet that demand
For our Geo Quiz, we were looking for the name of the capital of Ukraine. The answer is Kiev. The BBC's Gabriel Gatehouse reports on a controversy a local TV show that asked viewers to name the greatest Ukrainian of all time.
After the collapse of the Soviet Union, many Ukrainians left their country to find better jobs in the West, but now, some Ukrainians are reversing the pattern and are heading home because of new economic opportunities in Ukraine
The answer to today's Geo Quiz is Kyiv (Kiev), the capital of Ukraine. Russian translator Marian Schwartz reads a short passage from "The White Guard," Mikhail Bulgakov's novel set in the city of Kyiv.