The SolarWorld GT, a prototype solar-powered car designed and made by German students, stops off in Ukraine as part of its world tour.
The horse was first domesticated 6,000 years ago on the grasslands of the Ukraine, southwest Russia and west Kazakhstan, genetic evidence suggests.
Ancient remains uncovered in Ukraine represent some of the oldest evidence of modern people in Europe, experts say.
Ukraine marks the 25th anniversary of the world's worst nuclear accident - at Chernobyl - amid renewed global nuclear concern.
An international conference and summit in Ukraine will seek to raise funds to cover the cost of the Chernobyl nuclear disaster, 25 years on.
Staff at an aquarium in Ukraine fear for one of their crocodiles after it ate a mobile phone dropped into its enclosure by a visitor.