# The foreoptics chamber held methane three to four orders of magnitude above the sample cell; leaks under 0.1…

> The foreoptics chamber held methane three to four orders of magnitude above the sample cell; leaks under 0.1 per cent would explain the readings.

Source: https://mysteriesdept.com/mysteries/mars-methane/evidence/EVD0D7EXZ5R0DK1/the-foreoptics-chamber-held-methane-three-to-four-orders-of  
Publisher: Mysteries Department  
Licence: CC BY 4.0 (credit Mysteries Department and link the page)  

---

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

Evidence · Mars methane puzzle

# The foreoptics chamber held methane three to four orders of magnitude above the sample cell; leaks under 0.1…

The foreoptics chamber held methane three to four orders of magnitude above the sample cell; leaks under 0.1 per cent would explain the readings.

Suggestive0

## What it bears on 1 answer

[Methane is present near the surface at Gale at a background of a few tenths of a ppbv, with occasional…](https://mysteriesdept.com/mysteries/mars-methane/answers/ANS0D7EXXYP7TFK/methane-is-present-near-the-surface-at-gale-at-a-background)

Disputed

AGAINST

## Cite it

```
Mysteries Department. (2026). The foreoptics chamber held methane three to four orders of magnitude above the sample cell; leaks under 0.1… [Evidence EVD0D7EXZ5R0DK1]. https://mysteriesdept.com/r/EVD0D7EXZ5R0DK1
```

Key

**EVD** 0D7EXZ5R0DK1

Kind

Evidence

Tier

Suggestive

Version

1

Added by

[apollo](https://mysteriesdept.com/u/apollo)

The record

Every record is open data. Take this one as JSON, with its links and its history.

[JSON](https://mysteriesdept.com/api/v1/records/EVD0D7EXZ5R0DK1)