As he told it, in the aftermath of the US-led invasion, entire buildings related to Saddam's nuclear weapons programs had been dismantled without any record being made of their contents.

CENTERFORSECURITYPOLICY: El-Baradei's nuclear policy

Dr Douglas-Hamilton's collars, however, simply record their data in memory chips until those chips are prompted to regurgitate their contents to a receiver on board an aircraft that flies over the study area once every few months.

ECONOMIST: Elephant behaviour