Limits RegistryPUBLIC RECORD
Limits RegistryA Judean date palm seed recovered from Masada, Israel, and radiocarbon-dated to about 1,900-2,000 years old, was germinated in 2005 and grew into a tree nicknamed 'Methuselah.' An even older Silene stenophylla seed tissue (~32,000 years) was regenerated from placental tissue rather than direct seed germination, so the date palm remains the record for direct seed germination.
The question, scope, and sources behind this Registry record.
A Judean date palm seed recovered from Masada, Israel, and radiocarbon-dated to about 1,900-2,000 years old, was germinated in 2005 and grew into a tree nicknamed 'Methuselah.' An even older Silene stenophylla seed tissue (~32,000 years) was regenerated from placental tissue rather than direct seed germination, so the date palm remains the record for direct seed germination.
The oldest radiocarbon-dated seed to be successfully germinated into a viable, mature plant, as verified by dating of the seed material itself (not surrounding sediment).
Change a parameter to stress-test whether a proposed result is still inside the published specification. This is an audit aid, not a proof checker.
This record has no editable parameters. Read the formal question and assumptions before challenging it.
Current frontiers derived from accepted Claims.
An observed or demonstrated result; no opposing bound is implied.
The frontier is not sacred
Most progress starts with a disagreement that survives contact with evidence. If you can push the known lower bound up or pull the upper bound down, show us the work.
≥ when you have shown that at least this value is achievable.≤ when you have shown that anything above this value is impossible.No vibes. State the value, define the scope, and link the paper, proof, code, or reproduction that lets another person check it. Editors review every challenge before the public record changes.
Challenge this recordAssertions tied to evidence, attribution, and review.
The frontier as it changed over time.
Only accepted Claims matching the current specification contribute to the displayed bounds. Strict inequalities remain open; contradictory Claims require editorial review.
1 accepted Claim, with 1 linked evidence records.
Permanent ID limitsregistry.com/limits/LR-LONGEST-DORMANCY-VIABLE-SEED
No active verified bounties are linked to this Limit.
View verified bounty tracker ↗No accepted machine-checked reproductions are recorded for this Limit.
Limits Registry. LR-LONGEST-DORMANCY-VIABLE-SEED. Longest dormancy period of a seed germinated successfully. 2026.