Pralaya
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Pralaya (Sanskrit), in Hindu cosmology, is an aeonic term for Dissolution, which specifies different periods of time during which non activity situation persists, as per different formats or contexts. The word Mahapralaya stands for Great Dissolution. During each pralaya, the lower ten realms (loka) are destroyed, while the higher four realms, including Satya-loka, Tapa-loka, Jana-loka, and Mahar-loka are preserved. During each Mahapralaya, all 14 realms are destroyed.