{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2011:MSXZ7DL2UROZVKSPYDI5TT7MOW","short_pith_number":"pith:MSXZ7DL2","canonical_record":{"source":{"id":"1104.4322","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-17T17:39:39Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d329b0bc736bef057c0db9ffe0c6ca6415016a830f15be441640e1d45d510c74","abstract_canon_sha256":"5b9b8d288dffb36023d33579964b5acd68e03053fa72a3a0162dee79ce917088"},"schema_version":"1.0"},"canonical_sha256":"64af9f8d7aa45d9aaa4fc0d1d9cfec75ab431a58088bb09402a6382104e0357a","source":{"kind":"arxiv","id":"1104.4322","version":1},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.4322","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"arxiv_version","alias_value":"1104.4322v1","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.4322","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"pith_short_12","alias_value":"MSXZ7DL2UROZ","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"MSXZ7DL2UROZVKSP","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"MSXZ7DL2","created_at":"2026-05-18T12:26:34Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2011:MSXZ7DL2UROZVKSPYDI5TT7MOW","target":"record","payload":{"canonical_record":{"source":{"id":"1104.4322","kind":"arxiv","version":1},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-17T17:39:39Z","cross_cats_sorted":["astro-ph.CO"],"title_canon_sha256":"d329b0bc736bef057c0db9ffe0c6ca6415016a830f15be441640e1d45d510c74","abstract_canon_sha256":"5b9b8d288dffb36023d33579964b5acd68e03053fa72a3a0162dee79ce917088"},"schema_version":"1.0"},"canonical_sha256":"64af9f8d7aa45d9aaa4fc0d1d9cfec75ab431a58088bb09402a6382104e0357a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T04:23:44.564014Z","signature_b64":"vRT49owDNi1Nr7BmZGtTBLouwPrHWlH3IVOA2tEiX8RSxriSHIsXOdnbDExfjwtZAHPxjdcYxz9A2up51RtJAg==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"64af9f8d7aa45d9aaa4fc0d1d9cfec75ab431a58088bb09402a6382104e0357a","last_reissued_at":"2026-05-18T04:23:44.563348Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T04:23:44.563348Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1104.4322","source_version":1,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"0I9i+czLXLuXmpxPD9WfseF/NpsP3QyRfYCk7IQTamPeN5a9ayOZJPQdotN/K09kKXPkGQpYHKwdQDiCkrM9CA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T11:36:27.153335Z"},"content_sha256":"ab0beb5f956a108c83a516bf944d37efb4fb9bf82162109a7bb35e7be02a448d","schema_version":"1.0","event_id":"sha256:ab0beb5f956a108c83a516bf944d37efb4fb9bf82162109a7bb35e7be02a448d"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2011:MSXZ7DL2UROZVKSPYDI5TT7MOW","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"On the Origin and Evolution of Life in the Galaxy","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.CO"],"primary_cat":"astro-ph.EP","authors_text":"Holly Lucas, Michael McCabe","submitted_at":"2011-03-17T17:39:39Z","abstract_excerpt":"A simple stochastic model for evolution, based upon the need to pass a sequence of n critical steps (Carter 1983, Watson 2008) is applied to both terrestrial and extraterrestrial origins of life. In the former case, the time at which humans have emerged during the habitable period of the Earth suggests a value of n = 4. Progressively adding earlier evolutionary transitions (Maynard Smith and Szathmary, 1995) gives an optimum fit when n = 5, implying either that their initial transitions are not critical or that habitability began around 6 Ga ago. The origin of life on Mars or elsewhere within "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.4322","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"},"verdict_id":null},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T04:23:44Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"JAi6Cur7p1KFujovfA8svEmR1W/cC2L/Tyl4cJB0958skVbDve69z/g59WnHYPLBY4Qt+idLqwg1OHpHzez/Bg==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-27T11:36:27.153693Z"},"content_sha256":"3183b93d37eb6983fc69c6130fdd5f4ba2b225c8916c266a5503db219ce7aa9a","schema_version":"1.0","event_id":"sha256:3183b93d37eb6983fc69c6130fdd5f4ba2b225c8916c266a5503db219ce7aa9a"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW/bundle.json","state_url":"https://pith.science/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW/bundle.json","status":"primary"}],"public_keys":[{"key_id":"pith-v1-2026-05","algorithm":"ed25519","format":"raw","public_key_b64":"stVStoiQhXFxp4s2pdzPNoqVNBMojDU/fJ2db5S3CbM=","public_key_hex":"b2d552b68890857171a78b36a5dccf368a953413288c353f7c9d9d6f94b709b3","fingerprint_sha256_b32_first128bits":"RVFV5Z2OI2J3ZUO7ERDEBCYNKS","fingerprint_sha256_hex":"8d4b5ee74e4693bcd1df2446408b0d54","rotates_at":null,"url":"https://pith.science/pith-signing-key.json","notes":"Pith uses this Ed25519 key to sign canonical record SHA-256 digests. Verify with: ed25519_verify(public_key, message=canonical_sha256_bytes, signature=base64decode(signature_b64))."}],"merge_version":"pith-open-graph-merge-v1","built_at":"2026-05-27T11:36:27Z","links":{"resolver":"https://pith.science/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW","bundle":"https://pith.science/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW/bundle.json","state":"https://pith.science/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW/state.json","well_known_bundle":"https://pith.science/.well-known/pith/MSXZ7DL2UROZVKSPYDI5TT7MOW/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2011:MSXZ7DL2UROZVKSPYDI5TT7MOW","merge_version":"pith-open-graph-merge-v1","event_count":2,"valid_event_count":2,"invalid_event_count":0,"equivocation_count":0,"current":{"canonical_record":{"metadata":{"abstract_canon_sha256":"5b9b8d288dffb36023d33579964b5acd68e03053fa72a3a0162dee79ce917088","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-17T17:39:39Z","title_canon_sha256":"d329b0bc736bef057c0db9ffe0c6ca6415016a830f15be441640e1d45d510c74"},"schema_version":"1.0","source":{"id":"1104.4322","kind":"arxiv","version":1}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1104.4322","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"arxiv_version","alias_value":"1104.4322v1","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1104.4322","created_at":"2026-05-18T04:23:44Z"},{"alias_kind":"pith_short_12","alias_value":"MSXZ7DL2UROZ","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_16","alias_value":"MSXZ7DL2UROZVKSP","created_at":"2026-05-18T12:26:34Z"},{"alias_kind":"pith_short_8","alias_value":"MSXZ7DL2","created_at":"2026-05-18T12:26:34Z"}],"graph_snapshots":[{"event_id":"sha256:3183b93d37eb6983fc69c6130fdd5f4ba2b225c8916c266a5503db219ce7aa9a","target":"graph","created_at":"2026-05-18T04:23:44Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"graph_snapshot":{"author_claims":{"count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","strong_count":0},"builder_version":"pith-number-builder-2026-05-17-v1","claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"paper":{"abstract_excerpt":"A simple stochastic model for evolution, based upon the need to pass a sequence of n critical steps (Carter 1983, Watson 2008) is applied to both terrestrial and extraterrestrial origins of life. In the former case, the time at which humans have emerged during the habitable period of the Earth suggests a value of n = 4. Progressively adding earlier evolutionary transitions (Maynard Smith and Szathmary, 1995) gives an optimum fit when n = 5, implying either that their initial transitions are not critical or that habitability began around 6 Ga ago. The origin of life on Mars or elsewhere within ","authors_text":"Holly Lucas, Michael McCabe","cross_cats":["astro-ph.CO"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-17T17:39:39Z","title":"On the Origin and Evolution of Life in the Galaxy"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1104.4322","kind":"arxiv","version":1},"verdict":{"created_at":null,"id":null,"model_set":{},"one_line_summary":"","pipeline_version":null,"pith_extraction_headline":"","strongest_claim":"","weakest_assumption":""}},"verdict_id":null}}],"author_attestations":[],"timestamp_anchors":[],"storage_attestations":[],"citation_signatures":[],"replication_records":[],"corrections":[],"mirror_hints":[],"record_created":{"event_id":"sha256:ab0beb5f956a108c83a516bf944d37efb4fb9bf82162109a7bb35e7be02a448d","target":"record","created_at":"2026-05-18T04:23:44Z","signer":{"key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signer_id":"pith.science","signer_type":"pith_registry"},"payload":{"attestation_state":"computed","canonical_record":{"metadata":{"abstract_canon_sha256":"5b9b8d288dffb36023d33579964b5acd68e03053fa72a3a0162dee79ce917088","cross_cats_sorted":["astro-ph.CO"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"astro-ph.EP","submitted_at":"2011-03-17T17:39:39Z","title_canon_sha256":"d329b0bc736bef057c0db9ffe0c6ca6415016a830f15be441640e1d45d510c74"},"schema_version":"1.0","source":{"id":"1104.4322","kind":"arxiv","version":1}},"canonical_sha256":"64af9f8d7aa45d9aaa4fc0d1d9cfec75ab431a58088bb09402a6382104e0357a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"64af9f8d7aa45d9aaa4fc0d1d9cfec75ab431a58088bb09402a6382104e0357a","first_computed_at":"2026-05-18T04:23:44.563348Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T04:23:44.563348Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"vRT49owDNi1Nr7BmZGtTBLouwPrHWlH3IVOA2tEiX8RSxriSHIsXOdnbDExfjwtZAHPxjdcYxz9A2up51RtJAg==","signature_status":"signed_v1","signed_at":"2026-05-18T04:23:44.564014Z","signed_message":"canonical_sha256_bytes"},"source_id":"1104.4322","source_kind":"arxiv","source_version":1}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:ab0beb5f956a108c83a516bf944d37efb4fb9bf82162109a7bb35e7be02a448d","sha256:3183b93d37eb6983fc69c6130fdd5f4ba2b225c8916c266a5503db219ce7aa9a"],"state_sha256":"7b826e2a4edcb7fdcabfbad9c1c51ebf31dbe2c67b4a2526544098179eb5e7e9"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"+/Q/rnzoUOz4nilMN/h3/uIEw8xN6o7eqB+3lsq4+4BKkbCMd6JPf3qIO0W/PGK2OhXKp69aifng/24qFUvPAg==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-27T11:36:27.156152Z","bundle_sha256":"4a457cf1bd8b7b231875b72c4b8d2897ebd5618703565b679c301a7e33c07b6b"}}