They are also looking into recent purchases of wheat-based rodent poison in the area.

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Cutting out wheat-based foods such as bread and pasta could be the best thing you ever do, says one of his clients, tennis coach Pete McCraw, who has helped develop top players such as Maria Sharapova and Jelena Jankovic.

CNN: Grand slam diet: How to supercharge your body

The huts, made of chalk and straw daub and wheat-thatched roofing, have been based on archaeological remains found at Durrington Walls, near Stonehenge.

BBC: Old Sarum project sees Neolithic huts built

Fossil fuels, similarly -- we are trying to target fossil fuels and design so that you get fossil -- biomass to replace fossil fuel, but biomass based on, for example, woody materials, based on agricultural waste like wheat straw, corn cobs -- agricultural waste, lumber waste residues -- that's very inexpensive feedstock.

WHITEHOUSE: Press Briefing

The Swiss-based company supplies raw materials such as oil, copper and wheat and owns plants, warehouses and mines.

NPR: Glencore Sees Sharp Fall In 2012 Earnings

The Cambridge-based National Institute of Agricultural Botany has combined an ancient ancestor of wheat with a modern variety to produce a new strain.

BBC: Cambridge-based scientists develop 'superwheat'