{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.topic/1","content_sha256":"76732a4ed9824561aee54f0cb569493969406549ff477f52b47e9f0ded4e3c3d","created":"2026-10-03T07:17:51Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":[],"salt":"97ee2f32e8a0ce23628ccfc799659062f37e6b209dc6147c09a939204bad1017","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"topic"},"content":{"external_id":"cosmo.primordial-black-holes","field":"cosmo","n":"1","review_cite":"Carr B., Kuhnel F., Primordial Black Holes as Dark Matter: Recent Developments, Annual Review of Nuclear and Particle Science, 2020","review_link":"https://arxiv.org/abs/2006.02838","review_verified":"true","summary":"Black holes might have formed in the first second of the universe from rare, very dense regions, with masses anywhere from a mountain to many suns. Finding even one would reveal density ripples of the early universe on scales far smaller than any other probe reaches.","title":"Primordial black holes","topic_ref":null,"why":"Primordial black holes test the primordial density spectrum on scales far below those seen in the cosmic microwave background and could account for part of the dark matter, some black-hole mergers or the seeds of early supermassive black holes."},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9ab792b7e278762046677161a5c3d97a4c12042fe341bebc00b0f937c2c50d7a","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"d748fbf8693e8c2b9423be6597c73cdab20b5132b4829ee23a65a33ea0a8027a","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"niZ8OpVWEW32iI5aZT7Z6Lze27-346cYwHE8qIvRDR0eqpfp_viBdfRxSnv7viBJioSmgOwq_r-OIRVHkeQ5Cg"},"schema":"pubphys.envelope/1"},"record_hash":"9ab792b7e278762046677161a5c3d97a4c12042fe341bebc00b0f937c2c50d7a","leaf_index":191}