Around the world, questions have been asked over the legitimacy of many world leaders' claims of academic achievements. The list includes Ukrainian President Viktor Yanukovych and Russian President Vladimir Putin, who have both been suspected of plagiarizing their doctorates.
Azov, the country’s most visible ultranationalist group, also started their own political party — the National Corps. Members of their National Militia will serve as election observers in Sunday's presidential elections.
In March 2014, Russia’s “reacquisition” of Crimea operated more like an invasion, depending on who you ask. Now, five years later, Putin appears as comfortable as ever in Crimea while Ukrainians continue to struggle against Russian domination in the region.
Ukrainians exhausted by five years of war and decades of official corruption look set to send a comedian with no political experience into a second round run-off against the incumbent when they vote in Sunday's presidential election.
Competition for dominance between the churches of Constantinople and Moscow in the Orthodox Christian world is not new — it goes back more than 500 years. But the birth of the new Orthodox Church in Ukraine opens a new chapter in this history.
US President Donald Trump's former campaign manager Paul Manafort breached his plea agreement with Special Counsel Robert Mueller's office by lying to prosecutors about matters which are material to its Russia probe, a judge ruled on Wednesday.
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.
Saturday marks the 4th anniversary of the start of Ukraine's Orange Revolution. The promise was Western-style democracy. But Ukrainians are losing confidence in that democracy and the leaders that helped usher it in.
Ukraine's economy depends heavily on exports...especially steel. But now with many of the world's economies shrinking by the day, there are fewer places able to take what Ukraine has to offer. The BBC's Gabriel Gatehouse reports.
Some in Ukraine would like to see the country shake off its heavy reliance on Russian natural gas by tapping its huge coal resources. But Ukraine's coal mines are old, inefficient, and extremely dangerous.
Anchor Lisa Mullins speaks with Masha Lipman, a political analyst at the Carnegie Endowment for International Peace in Moscow, about the view from Russia of the standoff with Ukraine over natural gas supplies.
Anchor Lisa Mullins speaks with the BBC's Nick Thorpe in Budapest, Hungary, where some people are still shivering from a lack of heat. The natural gas dispute between Russia and Ukraine is to blame. The dispute apparently ended today, only to start again. We also hear how people are coping with the cold in Bulgaria and Bosnia.
The heat is back on in Ukraine. Residents there were without gas for nearly three weeks after Russia turned off the taps to the Ukraine in a dispute over pricing. The World's Gerry Hadden tells us a agreement has now been reached.
For today's Geo Quiz, we asked you to name a former Soviet Republic that's now making some changes to its map. Name changes, that is. The answer is Ukraine. Anchor Lisa Mullins speaks with Rostoslav Khotin, editor of the BBC's Ukrainian service.