Mysteries Department
Sign inRequest access
Answer · Phosphine in the clouds of Venus

Unknown photochemistry or geochemistry.

Unknown photochemistry or geochemistry.

Still possibleAnswers 1 questionPublished0

Where it stands

Still possibleIts tests haven't settled it: one piece of evidence for, one against. It needs two reviews to be accepted.

What it predicts

  • Laboratory or modelling work finds an abiotic pathway at the required rate.
  • Other reduced species appear with phosphine.

What would rule it out

  • A complete kinetic network showing no abiotic route can reach the observed abundance under any plausible Venus conditions.

Evidence 1 for · 1 against

The questions it answers

Cite it

Mysteries Department. (2026). Unknown photochemistry or geochemistry. [Answer ANS0CQY23164PM1]. https://mysteriesdept.com/r/ANS0CQY23164PM1
Private beta Downloads are for beta members

We're in a private beta while we get things right. Everything here is free to read; downloading datasets, sources and code is open to members for now.

It takes a couple of minutes. We'll reply by email.