# Rusty crust made Mars warm and wet

- Source: New Scientist - Space
- Published: 2026-10-30T15:00:00+00:00
- Category: Science
- Original: https://www.newscientist.com/article/2596726-rusty-crust-made-mars-warm-and-wet/?utm_campaign=RSS|NSNS&utm_content=space&utm_medium=RSS&utm_source=NSNS
- Canonical: https://groundlevelnews.com/story/rusty-crust-made-mars-warm-and-wet-b9970e/

It's unclear how and why Mars once became warm enough to allow water to flow on its surface, but a new idea suggests it comes down to rust below the surface

_Ground Level News shows a short summary only; the full article and all rights belong to New Scientist - Space._