Mauricio Bermudez from Colombia wants to know how holograms work.
A Volkswagen employee has been convicted in the US for his role in the emissions-cheating scandal. But DW's Andreas Becker asks whether former VW CEO Martin Winterkorn may one day land in court, too.
Despite UN sanctions against North Korea, a number of African countries share a cosy trade relationship with the pariah state. Old alliances dating back to Cold War times have persisted - and remain important even today.
Angela Merkel has been judged by viewers to be the more credible candidate following the election debate with her rival, Martin Schulz. What are the CDU and SPD candidates' positions on key domestic and global issues?
More than two-thirds of the world's countries are calling for a global ban on nuclear weapons. DW examines the questions over the state of weapons stockpiles, disarmament deals and their chances of success.
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