It's been very wet lately in Townsville and there is a thick, slippery coating of dark green algae on the concrete pavement and retaining walls at the DPI Station at Oonoonba, where I work. But there are strange circles in the green. Something seems to be eating the algae. A fungus? A virus? Proto- or metazoan?
See also http://jayavant.tumblr.com/post/4074628909/pavement-circles
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