{"bundle_type":"pith_open_graph_bundle","bundle_version":"1.0","pith_number":"pith:2012:HP3IWBFQHSEU7YO743OMCHOL46","short_pith_number":"pith:HP3IWBFQ","canonical_record":{"source":{"id":"1202.5048","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.BM","submitted_at":"2012-02-22T21:18:00Z","cross_cats_sorted":["astro-ph.EP","physics.chem-ph"],"title_canon_sha256":"3c778271d498c59c11b5368e76eb29d0cd247af7bf53b5c3ad08f91a3c220459","abstract_canon_sha256":"1ea5706ef2b54c8fd43b373eb9f0b66d7281e1ad58bbf27f831bc552ade848e5"},"schema_version":"1.0"},"canonical_sha256":"3bf68b04b03c894fe1dfe6dcc11dcbe7864d5511240a8a0eae8dadbd2f5e9a5a","source":{"kind":"arxiv","id":"1202.5048","version":2},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.5048","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1202.5048v2","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5048","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"HP3IWBFQHSEU","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HP3IWBFQHSEU7YO7","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HP3IWBFQ","created_at":"2026-05-18T12:27:09Z"}],"events":[{"event_type":"record_created","subject_pith_number":"pith:2012:HP3IWBFQHSEU7YO743OMCHOL46","target":"record","payload":{"canonical_record":{"source":{"id":"1202.5048","kind":"arxiv","version":2},"metadata":{"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.BM","submitted_at":"2012-02-22T21:18:00Z","cross_cats_sorted":["astro-ph.EP","physics.chem-ph"],"title_canon_sha256":"3c778271d498c59c11b5368e76eb29d0cd247af7bf53b5c3ad08f91a3c220459","abstract_canon_sha256":"1ea5706ef2b54c8fd43b373eb9f0b66d7281e1ad58bbf27f831bc552ade848e5"},"schema_version":"1.0"},"canonical_sha256":"3bf68b04b03c894fe1dfe6dcc11dcbe7864d5511240a8a0eae8dadbd2f5e9a5a","receipt":{"kind":"pith_receipt","key_id":"pith-v1-2026-05","algorithm":"ed25519","signed_at":"2026-05-18T01:58:20.557712Z","signature_b64":"q50TqnTkq7XZDFv4gktortm+gHstTqaDNoP9XTi2nlHRq98juMgoN9AvbOXd6I0glH02PP3qxY8JXDpspOmdBA==","signed_message":"canonical_sha256_bytes","builder_version":"pith-number-builder-2026-05-17-v1","receipt_version":"0.3","canonical_sha256":"3bf68b04b03c894fe1dfe6dcc11dcbe7864d5511240a8a0eae8dadbd2f5e9a5a","last_reissued_at":"2026-05-18T01:58:20.557192Z","signature_status":"signed_v1","first_computed_at":"2026-05-18T01:58:20.557192Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"source_kind":"arxiv","source_id":"1202.5048","source_version":2,"attestation_state":"computed"},"signer":{"signer_id":"pith.science","signer_type":"pith_registry","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54"},"created_at":"2026-05-18T01:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"xobzAwLfPWh//Zov4kxp1TMa4n3Boh6OqFMztW6LYGEX0lQBukb7BAEl62tzsZ1nhBADIkXFa41IOzyA2IRNBA==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:33:13.971181Z"},"content_sha256":"fd046ed7a89a7f4014c3956a53a5b66e0f45224481dd51e2b7b8d44c5f844388","schema_version":"1.0","event_id":"sha256:fd046ed7a89a7f4014c3956a53a5b66e0f45224481dd51e2b7b8d44c5f844388"},{"event_type":"graph_snapshot","subject_pith_number":"pith:2012:HP3IWBFQHSEU7YO743OMCHOL46","target":"graph","payload":{"graph_snapshot":{"paper":{"title":"Life's Chirality From Prebiotic Environments","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["astro-ph.EP","physics.chem-ph"],"primary_cat":"q-bio.BM","authors_text":"Marcelo Gleiser, Sara Imari Walker","submitted_at":"2012-02-22T21:18:00Z","abstract_excerpt":"A key open question in the study of life is the origin of biomolecular homochirality: almost every life-form on Earth has exclusively levorotary amino acids and dextrorotary sugars. Will the same handedness be preferred if life is found elsewhere? We review some of the pertinent literature and discuss recent results suggesting that life's homochirality resulted from sequential chiral symmetry breaking triggered by environmental events. In one scenario, autocatalytic prebiotic reactions undergo stochastic fluctuations due to environmental disturbances. In another, chiral-selective polymerizatio"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5048","kind":"arxiv","version":2},"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":"2026-05-18T01:58:20Z","supersedes":[],"prev_event":null,"signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"yzQtqs8oi9wGmV8erf9CjacZICzUHiz6oarwHeDfSyTqsHzBrRULjYXZxfEUB/o3Qg06gjb8J+8VDKlGtIUQCQ==","signed_message":"open_graph_event_sha256_bytes","signed_at":"2026-05-31T17:33:13.971568Z"},"content_sha256":"68607c359d960f0697f7727379b0bb0dd53b1fc41ee110109521732f9e6c4416","schema_version":"1.0","event_id":"sha256:68607c359d960f0697f7727379b0bb0dd53b1fc41ee110109521732f9e6c4416"}],"timestamp_proofs":[],"mirror_hints":[{"mirror_type":"https","name":"Pith Resolver","base_url":"https://pith.science","bundle_url":"https://pith.science/pith/HP3IWBFQHSEU7YO743OMCHOL46/bundle.json","state_url":"https://pith.science/pith/HP3IWBFQHSEU7YO743OMCHOL46/state.json","well_known_bundle_url":"https://pith.science/.well-known/pith/HP3IWBFQHSEU7YO743OMCHOL46/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":"2026-05-31T17:33:13Z","links":{"resolver":"https://pith.science/pith/HP3IWBFQHSEU7YO743OMCHOL46","bundle":"https://pith.science/pith/HP3IWBFQHSEU7YO743OMCHOL46/bundle.json","state":"https://pith.science/pith/HP3IWBFQHSEU7YO743OMCHOL46/state.json","well_known_bundle":"https://pith.science/.well-known/pith/HP3IWBFQHSEU7YO743OMCHOL46/bundle.json"},"state":{"state_type":"pith_open_graph_state","state_version":"1.0","pith_number":"pith:2012:HP3IWBFQHSEU7YO743OMCHOL46","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":"1ea5706ef2b54c8fd43b373eb9f0b66d7281e1ad58bbf27f831bc552ade848e5","cross_cats_sorted":["astro-ph.EP","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.BM","submitted_at":"2012-02-22T21:18:00Z","title_canon_sha256":"3c778271d498c59c11b5368e76eb29d0cd247af7bf53b5c3ad08f91a3c220459"},"schema_version":"1.0","source":{"id":"1202.5048","kind":"arxiv","version":2}},"source_aliases":[{"alias_kind":"arxiv","alias_value":"1202.5048","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"arxiv_version","alias_value":"1202.5048v2","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"doi","alias_value":"10.48550/arxiv.1202.5048","created_at":"2026-05-18T01:58:20Z"},{"alias_kind":"pith_short_12","alias_value":"HP3IWBFQHSEU","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_16","alias_value":"HP3IWBFQHSEU7YO7","created_at":"2026-05-18T12:27:09Z"},{"alias_kind":"pith_short_8","alias_value":"HP3IWBFQ","created_at":"2026-05-18T12:27:09Z"}],"graph_snapshots":[{"event_id":"sha256:68607c359d960f0697f7727379b0bb0dd53b1fc41ee110109521732f9e6c4416","target":"graph","created_at":"2026-05-18T01:58:20Z","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 key open question in the study of life is the origin of biomolecular homochirality: almost every life-form on Earth has exclusively levorotary amino acids and dextrorotary sugars. Will the same handedness be preferred if life is found elsewhere? We review some of the pertinent literature and discuss recent results suggesting that life's homochirality resulted from sequential chiral symmetry breaking triggered by environmental events. In one scenario, autocatalytic prebiotic reactions undergo stochastic fluctuations due to environmental disturbances. In another, chiral-selective polymerizatio","authors_text":"Marcelo Gleiser, Sara Imari Walker","cross_cats":["astro-ph.EP","physics.chem-ph"],"headline":"","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.BM","submitted_at":"2012-02-22T21:18:00Z","title":"Life's Chirality From Prebiotic Environments"},"references":{"count":0,"internal_anchors":0,"resolved_work":0,"sample":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1202.5048","kind":"arxiv","version":2},"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:fd046ed7a89a7f4014c3956a53a5b66e0f45224481dd51e2b7b8d44c5f844388","target":"record","created_at":"2026-05-18T01:58:20Z","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":"1ea5706ef2b54c8fd43b373eb9f0b66d7281e1ad58bbf27f831bc552ade848e5","cross_cats_sorted":["astro-ph.EP","physics.chem-ph"],"license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","primary_cat":"q-bio.BM","submitted_at":"2012-02-22T21:18:00Z","title_canon_sha256":"3c778271d498c59c11b5368e76eb29d0cd247af7bf53b5c3ad08f91a3c220459"},"schema_version":"1.0","source":{"id":"1202.5048","kind":"arxiv","version":2}},"canonical_sha256":"3bf68b04b03c894fe1dfe6dcc11dcbe7864d5511240a8a0eae8dadbd2f5e9a5a","receipt":{"algorithm":"ed25519","builder_version":"pith-number-builder-2026-05-17-v1","canonical_sha256":"3bf68b04b03c894fe1dfe6dcc11dcbe7864d5511240a8a0eae8dadbd2f5e9a5a","first_computed_at":"2026-05-18T01:58:20.557192Z","key_id":"pith-v1-2026-05","kind":"pith_receipt","last_reissued_at":"2026-05-18T01:58:20.557192Z","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","receipt_version":"0.3","signature_b64":"q50TqnTkq7XZDFv4gktortm+gHstTqaDNoP9XTi2nlHRq98juMgoN9AvbOXd6I0glH02PP3qxY8JXDpspOmdBA==","signature_status":"signed_v1","signed_at":"2026-05-18T01:58:20.557712Z","signed_message":"canonical_sha256_bytes"},"source_id":"1202.5048","source_kind":"arxiv","source_version":2}}},"equivocations":[],"invalid_events":[],"applied_event_ids":["sha256:fd046ed7a89a7f4014c3956a53a5b66e0f45224481dd51e2b7b8d44c5f844388","sha256:68607c359d960f0697f7727379b0bb0dd53b1fc41ee110109521732f9e6c4416"],"state_sha256":"6c5c4f5ffae1a71a86763ec1167459e1c89b64c5874ae66e49558aece620cab1"},"bundle_signature":{"signature_status":"signed_v1","algorithm":"ed25519","key_id":"pith-v1-2026-05","public_key_fingerprint":"8d4b5ee74e4693bcd1df2446408b0d54","signature_b64":"zako6HUKGWaSXa1rPOpmWUbDCNM2A7LveRovKyjs+upkXVZI3C8Rgh1i9eJzKx8A6dcRYtbd0gL3f7keCQzKBw==","signed_message":"bundle_sha256_bytes","signed_at":"2026-05-31T17:33:13.973870Z","bundle_sha256":"9905556bdf833bee692dccb139212184c3d860ac7035d71e91a6beefed3ce49f"}}