The research is open
Pick a missing branch.
Leave your mark on history.
Challenges turn a broad family tree into a shared mission. Add sourced people and relationships, pass community review, and earn a place on that challenge's leaderboard.
From idea to public tree
- 1Contribute a sourced person or link
- 2Independent users review the evidence
- 3Consensus publishes an auditable change
Choose your investigation
Open challenges
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