A New Theory of the Earth the flood. He asserted that the Earth was originally a comet, which God formed from its initial "chaos and void" into a habitable planet. He also argued that the flood itself was caused when the Earth passed through the tail of a comet, which, it was known by that time, are composed largely of water. His analysis was very detailed, and similar ideas were promoted in the 1960s by other creationists postulating causes for the global flood, along with similarity to the ideas of Immanuel Velikovsky. However, many of them are in direct conflict with contemporary scientific understandings; and comets
Sinkhole spaces and caverns develop underground. These sinkholes can be dramatic, because the surface land usually stays intact until there is not enough support. Then, a sudden collapse of the land surface can occur. On 2 July 2015, scientists reported that active pits, related to sinkhole collapses and possibly associated with outbursts, were found on the comet 67P/Churyumov-Gerasimenko by the "Rosetta" space probe. Collapses, commonly incorrectly labeled as sinkholes also occur due to human activity, such as the collapse of abandoned mines and salt cavern storage in salt domes in places like Louisiana, Mississippi and Texas. More commonly, collapses occur in