British Museum looks to crack mystery over decorated ostrich eggs

Experts reexamine eggs - some dating back to bronze age - to understand origins and designs

They are about the same size as a standard Easter egg, but are rather older - with some specimens dating back five millennia to the early bronze age.

A collection of decorated ostrich eggs belonging to the British Museum in London has been reexamined by experts in an effort to understand where they originated, and how their often elaborately painted or engraved designs were created.