Twelve tonnes of ivory was set alight by President Daniel Arap Moi in Nairobi National Park in July 1989, to highlight the threat from poaching. The ivory burn was organised by conservationists who wanted to save the world's elephants. Plus, the closure of Britain's ground-breaking Common Cold Unit; Cuba executes top military officers, the Chinese allow sales of tampons and the first modern lesbian.

(Photo: Ivory tusks arranged in a pile and set alight. Credit: Andrew Holbrooke/Corbis/Getty Images)