Angel Hair
Angel hair is a fine, cobweb-like filament substance that witnesses have periodically reported falling from the sky in the minutes or hours following a UFO sighting, dissolving or evaporating within a short time of being touched or collected — most famously during the Oloron, France sighting of October 1952, when threads reportedly draped over trees, telephone wires, and rooftops across the town before vanishing. The evaporating quality is exactly what makes angel hair such a frustrating case type for investigators: by the time any sample could reach a laboratory for real chemical analysis, the material had typically already broken down, leaving witness description and hasty field notes as the only surviving record rather than a testable physical specimen. The leading conventional explanation is ballooning spider silk — many spider species genuinely do release fine gossamer threads to catch wind currents and disperse, a behavior well documented by entomologists independent of any UFO context, and one that can plausibly account for sudden, localized filament falls under the right atmospheric conditions. Angel hair remains grouped with other trace-case evidence precisely because, unlike a witness's verbal account, it is at least in principle a physical, collectible substance — even though its chemistry has, so far, always evaporated before it could be conclusively identified either way.