Just spit into a test tube to find out where you come from. Ancestry DNA tests have become increasingly popular. But scientists say the results are often far off the mark.
New genetic tests on the remains appear to put an end to a long-running debate. Clerics had refused to recognize them as having belonged to Russia's last czar and his family, who were all murdered exactly 100 years ago.
Dubbed the "African Che Guevara," Thomas Sankara led a revolution in the former Upper Volta, reinventing the state as Burkina Faso. Even though he was murdered only years later, his influence lasts until today.
The famous Polish composer has been dead for nearly 170 years. His body is in Paris, but his heart is in a glass jar encased in stone in Warsaw. Now scientists believe they can dispel doubts about the cause of his death.
The terrorist organization "Islamic State" has largely been defeated in a military sense. But its ideologies live on, for example, in children who grew up under its regime. Other challenges remain as well.
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