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In page Eschatology:

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In Hindu eschatology, time is cyclic and consists of kalpas. Each lasts 4.1–8.2 billion years, which is a period of one full day and night for Brahma, who will be alive for 311 trillion, 40 billion years. Within a kalpa there are periods of creation, preservation and decline. After this larger cycle, all of creation will contract to a singularity[citation needed] and then again will expand from that single point, as the ages continue in a religious fractal pattern.[2]