Authorities in Malaysia find several mass graves near the border with Thailand suspected of containing the bodies of trafficked migrants.
Composing an urban masterpiece
Breeding a new plant to save coffee from extinction
The twists and turns of Eurovision 2015
The story of Robert Mugabe, Gucci Grace and the Crocodile
Farc deal "no cure" for Panama's border problems
How different countries view the Rohingya 'problem'
The week's big numbers visualised
One short, one long, both hotly debated online
The best reads of the week you may have missed