{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"66e8f1db71a9c327380a5c918fa378fb3c6ffbed6b4e4fc17a0a745a22d35b9b","created":"2026-10-03T07:17:53Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"4f36348561c4a62e239fcbaac39077b5af39c80f67528d3f8428c88d9141e46e","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"stat.arrow-of-time","field":"stat","n":"1","review_cite":"J. L. Lebowitz, Statistical mechanics: A selective review of two central issues, Reviews of Modern Physics, 1999","review_link":"https://arxiv.org/abs/math-ph/0010018","review_verified":"true","summary":"The laws of motion work the same forwards and backwards in time, yet eggs break and never unbreak. Statistical physics explains this only if the universe started in a very special low-entropy state, and why it did is not explained.","title":"Arrow of time and the low-entropy past","topic_ref":null,"why":"It underlies the second law of thermodynamics, memory, causation and the direction of every irreversible process."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"2f4dc88a2c639842c1ae7938feaf510da04432edfd04b5e5105e381f11cbf684","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"767e8aee4c988b2ae98f2603ce2d0075f7ac883f7a25d9c448c8567e46ee22f2","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"kBCVWAZ7hKkl_YZh9h8CweCG0FVBrav6mK-hdMnTqo5e6iHyLbYJ_teFlSBChhDVtHtCQfXJR3eArhpMZbMwAg"},"schema":"pubphys.envelope/1"},"record_hash":"2f4dc88a2c639842c1ae7938feaf510da04432edfd04b5e5105e381f11cbf684","leaf_index":350}