NASA Says Mars Rover Discovered Potential Biosignature in 2024

And here is the Nature paper: https://www.nature.com/articles/s41586-025-09413-0

Sadly, our best chance of confirming/refuting this finding is in a sample return mission, but our current Mars sample return project is in deep trouble.

It is likely that China will complete a sample return from Mars before we do.

Rocket Lab has proposed an innovative sample return mission, which it offers to do for a fixed price, but so far no one in Congress or NASA is returning their call.