World's oldest UFO photo may depict something else entirely

This stereoscopic image was captured c.1870 during a meteorological expedition at New Hampshire's Mount Washington. The image was long forgotten until 2002 when it showed up on eBay and ultimately sold for $385, much more than similar stereoscope images. Why? Because it's the oldest photograph of a UFO in the world. Or so people thought at the time.

UFO …