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The Solar storm of August 28 to September 2, 1859—known as the Carrington Event—was a powerful geomagnetic solar storm during solar cycle 10 (1855–1867). A solar coronal mass ejection(CME) hit Earth's magnetosphere and induced one of the largest geomagnetic storms on record. The flare traveled directly toward Earth, taking 17.6 hours to make the 150 million kilometer (93 million mile) journey. It is believed that the relatively high speed of this CME (typical CMEs take several days to arrive at Earth) was made possible by a prior CME, perhaps the cause of the large aurora event on August 29, that...

15,000 to 11,000 years ago Earth experienced a series of climatic fluctuations... there was a short cold spell, known as the Younger Dryas, before the final warming and... end of the last ice age. Based on Greenland ice core data, the Younger Dryas began... 10,900 B.C., and its ending... circa 9700 B.C. and may have occurred within an incredible three years... I once hypothesized that comets were responsible. A comet hitting the land or a shallow ocean, or exploding above the land's surface, scattering dust and debris into the atmosphere, would cause global cooling... This pattern fits well with the...

According to Robert Temple, a moat theory explains the water weathering of the Sphinx without hypothesizing that it dates back to an earlier period of more rainfall than the present. I will not address his other hypotheses, which I do not find persuasive, that the Sphinx was the jackal [wild dog] Anubis and the face seen on the Sphinx is that of the Middle Kingdom pharaoh Amenemhet II, though I note the original Sphinx has been reworked and the head re-carved... Assuming the argument that the Sphinx sat in a pool, either the water level around the Sphinx was the...