A biosignature is a clue, not a verdict
A useful life-detection claim specifies the measurement, its biological interpretation and the non-biological alternatives.
Explore research, public records and open questions.
A useful life-detection claim specifies the measurement, its biological interpretation and the non-biological alternatives.
Life beyond Earth is a research question spanning chemistry, geology, biology and planetary environments.
Cassini data revealed phosphorus in material from Saturn’s ocean moon. What the measurement supports, and what it leaves open.
Beneath Europa’s fractured ice may lie an ocean. The next question is whether it could support life — and what evidence would answer it.