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Why would the three-pronged plug be embedded in a rock? What purpose would such an object serve? Another mystery related to the stone of heaven is that this artifact is always found in soil layers dating to at least 12000 BC. The stone was certainly produced by an unknown, highly advanced civilization lost in time.
Frog That Gives Birth Through Its Mouth: the Australian gastric-brooding frog lays eggs, which are coated in prostaglandin. This causes the frog to stop producing gastric acid in its stomach, thus making the frog's stomach a very nice place for eggs to develope . So the frog swallows the eggs, incubates them in her gut, and when they hatch, the baby frogs crawl out of her mouth.