Number 33
I don't know much about these, but having opened the challenge have found out that the world centre for them is around Avebury in Wiltshire - an hour and a half away from us. Reading up on them after the challenge, the debate is between people who believe they're man-made - which is hard to believe, looking at the pictures of the complicated ones - or whether they're made by aliens - which is hard to believe, looking at the pictures of aliens - I will give the definitive verdict.
1 comment:
I think you have forgotten the natural phenomena theory. A clever tornado, heavy spot fog or localised mud whirlpool all seem feasible to me.
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