The strongest hints yet that Mars once hosted living microbes are no longer theoretical models or ambiguous chemistry. They are etched into a single, oddly speckled rock in an ancient riverbed, where ...

On an island in southern Egypt, a single unfinished granite object reveals straight facets and tool marks that look anything ...

New method also detects molecular signs of photosynthesis almost 1 billion years earlier than previously documented; Combining chemistry and AI, pioneering method could revolutionize search for ...