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8 natural mysteries that can't be explained

By: Melissa Breyer on Sept. 28, 2015, 1:01 p.m.
Star jelly

Photo: James Lindsey/Wikimedia Commons

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Star jelly

Reports of globular blobs falling from the sky and plopping into fields and meadows date back to at least the 14th century. Also known variously as astral jelly, star-shot, star-slime, star-slough, star-slubber and star-slutch, folklore explained the curious goop as a substance deposited after meteor showers. If not frequent, reports of the mysterious goop occur with a surprising degree of regularity. But nobody can say for sure what it is, as it dissipates relatively quickly after it appears and analysis has been challenging. Speculation has ranged to everything from the paranormal to unknown fungi or slime molds to something of an amphibious nature, but no succinct identification has been confirmed by science.