Geologists have dated mountains all over the world, allowing them to discover some of the oldest and youngest ranges on the planet.
Experts have described two swords from the Byzantine Empire that have unusual designs.
Donkeys, also called burros and asses, are found throughout the world. They look a lot like their cousins, but have long, floppy ears and tend to be stockier than horses or zebras.
A man who had never taken antibiotics before ended up with a case of mania after taking medication for bacterial pneumonia.