THE EVIDENCE LAYER
Public signals, clearly labeled.
HowSoon uses public research and forecasting sources where they meaningfully apply to a milestone. Source availability varies by category, so a source badge means the source informed that milestone—not that every source applies everywhere.
Clinical research
ClinicalTrials.gov provides public trial activity signals for relevant medicine and longevity milestones.
Forecast signals
Metaculus provides community forecasting signals for selected questions whose resolution criteria match a tracked milestone.
Research momentum
arXiv publication activity helps observe research velocity in selected technical domains.
Regulatory signals
openFDA is used where public drug-approval data can provide context for medicine-related milestones.