Explore / Chemistry
2,400 explorers / 2 open questions / 2200 papers
Cathedral separates the established mechanism, the historical contribution chain, and the unresolved assumptions so each can be inspected independently.
Known nodes connect to ghost nodes where questions remain open.
Credit follows documented contributions. Open questions remain attached to the historical path rather than being presented as context-free prompts.
1869
The periodic system organizes elements and leaves predictive gaps.
Mendeleev treated missing entries as predictions rather than defects in the table.
Dmitri Mendeleev
Chemist who organized the periodic system and used its gaps to make risky, testable predictions about undiscovered elements.