Quote:
Originally Posted by Andy01
When I was 19 my mates and I had heard about this place at Mt. Cotton, south of Brisbane. Today Tonight did a story about Mt. View Rd, which apparently was a gravity anomaly because it was a hill that you could roll ... Up!
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Somewhere I have an ancient Popular Mechanics article in which the magazine investigates a couple of then-famous "gravity anomalies" in the USA, and also what were popularly known as "spook lights."
Both phenomena were revealed as being optical illusions.
I cannot recall the exact mechanism pertaining to the "gravity anomaly": It was something to do with the the fall of the road compared with that of the local topography.
There's a great example of this at the base of the Benmore Range, near Omarama. An irrigation canal has been cut into the side of a hill. It runs roughly parallel with the nearby highway. To people driving past, the canal -- and the water in it -- appears to be rising, when in fact it's doing the opposite. The reason is the highway and surrounding terrain is sloping downwards even more than the canal, but people perceive the road as being level.
The spook lights were the result of a thermally-induced "mirage" of automobile headlights on a distant highway, and the magazine described an observed effect exactly as you have, with a wavering mass of reddish light rising and separating into two "eyes."
Just thought I'd mention it.