I'd probably burn a CD of live Fleetwood Mac and give it to them - ask if they wanted to go and see a film! No, but seriously, you'd match the tracks to a known wheelrim - somehow.
Earliest known depiction of a wheeled vehicle ( http://en.wikipedia.org/wiki/Bronocice_pot ). Most recent depiction of something wheel-like ( http://www.cropcircleconnector.com/2008/honeystreet4/honeystreet2008d.html ). p.s. That wheatfield at Honey Street will be sprouting in the ear, probably. Farmers are saying the 'Harvest From Hell'.
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