Mykhailo Fedorov, a popular young leader who was fired last month, said Russia should not be allowed to dictate when Ukrainians can choose their next government.

A German archaeologist’s dig of important historic pieces in the 1870s set off an ownership battle between Turkey, Germany and Russia, with no signs of abating.

European governments, facing a nearly $1 trillion gap in investment funding, are casting a wide net to back start-ups developing pioneering technologies.