{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"6d40c58c95cc0c1157f33acfcb1e04ea967fc6bbdfa0bddde3cd4df377abaafa","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"7d0505cb8f690b3929a9cce544b5bcf1997f9f3dd8d1c6f85047ed79833826be","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cosmo.lithium-problem","field":"cosmo","n":"1","review_cite":"Fields B.D., The Primordial Lithium Problem, Annual Review of Nuclear and Particle Science, 2011","review_link":"https://arxiv.org/abs/1203.3551","review_verified":"true","summary":"In the first few minutes the universe fused hydrogen into helium and small amounts of deuterium and lithium, and theory predicts the amounts precisely. Deuterium and helium roughly match observations, but the oldest stars contain about three times less lithium-7 than predicted.","title":"Primordial lithium and Big Bang nucleosynthesis","topic_ref":null,"why":"Nucleosynthesis is the earliest well-tested epoch of the universe, so an unexplained mismatch could signal new particle physics or gaps in stellar physics."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"3b29f7c24689f116d4e24a9b9965296a8a7d4d58f92b9ab5ac13f314c66ba629","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"f899a0592b47e4c90181efe492b6602bb27c48b44aa9b8b18c5a6d1c7d36b3a8","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"vcqR9LEDUEKnbeyzIDGOMGs3HqZXQV1H5Citqd_1SmSr--kXdaHyEu28SHRLE5FjO7kqlKq1Hc9pcp6Vd5bLCA"},"schema":"pubphys.envelope/1"},"record_hash":"3b29f7c24689f116d4e24a9b9965296a8a7d4d58f92b9ab5ac13f314c66ba629","leaf_index":190}