All this geographic mania amuses the de facto father of the mapping field: Jack Dangermond, founder and president of Environmental Systems Research Institute, the 37-year-old firm that is the Microsoft of mapping.
Current estimates put the combined bitumen in these deposits at 1.7 trillion barrels, and some geologists believe more field work will jack that number up a fair bit further.
Wigan, unbeaten in five games at the DW Stadium, looked well in control but the catalyst for Arsenal's improvement finally came when Diaby left the field with a calf injury and Jack Wilshere came into the fray, bringing some much needed determination and urgency to lacklustre Arsenal.
