Waste guzzling fly factory wins African innovation prize A fly factory that transforms blood, guts, manure and discarded food into animal feed has walked away with a $100,000 UN-backed innovation prize. The Stellenbosch, South Africa-based initiative uses the prolific egg layers to recycle industry's cast-offs into reusable protein by mimicking nature and harnessing the winged insects, usually regarded as pests. Other inventions, like apps for surveys or malaria tests, were showcased at a special African inventions fair. Images and soundbites