NASA may have proof life once existed on Mars

The abundance of long-chain hydrocarbons in Gale crater mudstone, and iron phosphate and iron sulfide in Jezero crater mudstone supports the notion of at least bacteriological life on Mars.

It's a rehash of a 2025 result. They have a tiny ammount of organic stuff now and a new numerical model that predict a lot of organic stuff a long time ago. If the calculation is correct, it's probably a good indicator, but I'm suspictious after the infamous arsenic life paper https://en.wikipedia.org/wiki/GFAJ-1

TLDR:

The sample is still on Mars. It presents tiny dots that, on Earth, form in soils due to the presence of microbial activity.