A project created by the Zoological Society of London (ZSL) that uses Raspberry Pi computers to curb the illegal poaching of rhinos in Kenya has been rewarded with a £500,000 prize from Google.

The Global IT Challenge aims to award innovative uses of technology that "tackle some of the world's biggest challenges" with three top prizes selected by a panel of judges including Sir Tim Berners-Lee and Sir Richard Branson, and a fourth prize designated the "people's choice".