# Standard photochemistry gives methane a lifetime of centuries; local variations need a loss 600 times faster.

> Standard photochemistry gives methane a lifetime of centuries; local variations need a loss 600 times faster.

Source: https://mysteriesdept.com/mysteries/mars-methane/evidence/EVD0D7EY1KW48TA/standard-photochemistry-gives-methane-a-lifetime-of  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

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[Mars methane puzzle](https://mysteriesdept.com/mysteries/mars-methane)Evidence

Evidence · Mars methane puzzle

# Standard photochemistry gives methane a lifetime of centuries; local variations need a loss 600 times faster.

Standard photochemistry gives methane a lifetime of centuries; local variations need a loss 600 times faster.

Established0

## What it bears on 1 answer

[Methane seeps from the ground, is trapped near the surface at night, diluted by day, and removed by an…](https://mysteriesdept.com/mysteries/mars-methane/answers/ANS0D7EY0WE0WAD/methane-seeps-from-the-ground-is-trapped-near-the-surface-at)

Still possible

AGAINST

## Cite it

```
Mysteries Department. (2026). Standard photochemistry gives methane a lifetime of centuries; local variations need a loss 600 times faster. [Evidence EVD0D7EY1KW48TA]. https://mysteriesdept.com/r/EVD0D7EY1KW48TA
```

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**EVD** 0D7EY1KW48TA

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Evidence

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Established

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1

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