First credible detection of extraterrestrial life
SPC-01 · probability 40% (confidence 50%, ±18 pts) over 2026-2040 · horizon NEXT 5-10Y · domain space. Probabilistic simulation, not advice.
The reading
Three independent detection pathways are live simultaneously for the first time in history: JWST exoplanet atmospheres (the contested K2-18b dimethyl-sulfide signal awaits confirmation), Europa Clipper's 2030 arrival at an ocean twice Earth's volume, and cached Mars samples awaiting return. Each path alone is a long shot; the probability that at least one pays off inside 15 years is the strongest it has ever been.
What would prove this wrong
This projection is WRONG if by 2040 no biosignature detection reaches >5-sigma community consensus across independent teams and instruments, and Europa/Enceladus ocean chemistry proves abiotic.
Trigger events tracked
- JWST follow-up spectroscopy confirming (or killing) the K2-18b DMS signal at high significance
- Europa Clipper flybys (from 2030) detecting organic chemistry in plume material
- Mars Sample Return architecture funded and samples analyzed in terrestrial labs
- Next-generation instruments (ELT, Habitable Worlds Observatory) coming online with biosignature sensitivity
Causal chain
Historical precedents
If it happens
Field notes
2026-08-28: Adjudication clarification: the entry is graded on whether the stated event occurred by the resolve date — the falsifiability line is the pre-registered strong-refutation test, not a second event definition. If no 5-sigma consensus detection exists by 2040 this scores as NOT OCCURRED; the Europa/Enceladus clause is context and is not required to resolve. The sealed probability is unchanged.
Sources
Directly related seals
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