Nickel on Earth is used by many microorganisms to run their metabolic processes.
More evidence that Mars was once a habitable, wet oasis not dissimilar to Earth has been found in the rocks scattered throughout the red planet. A team of researchers who analyzed the thousands of ...
For decades, the search for life on Mars has been a story of hints and maybes, of chemical curiosities that stopped just short of a clear biological signal. That changed this year when a single, ...