Listen to the eerie hum of Utah's Rainbow Bridge: Scientists use interactive 3D model to reveal mysterious sound's cause
It has baffled visitors and scientists for decades - a strange hum emanating from one of Utah's iconic rock arches.
Now, researchers have solved the mystery, and say Utah's iconic Rainbow Bridge hums with a mix of natural and man-made vibrations.
At nearly 300 feet from the canyon floor to the apex of the arch, Rainbow Bridge is one of the highest natural bridges in the world.
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The study analysed the different ways the bridge vibrates and what frequencies and energy sources cause the rock structure to resonate.
The vibrations are small, according to geology and... read more
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