Biosignatures
3 articles
How Perseverance Hunts for Life: The Scan, Analyze, Sample Workflow Aboard NASA's Mars Rover
NASA's Perseverance rover employs a systematic scan-analyze-sample workflow to search for signs of ancient microbial life on Mars, using advanced instruments for landscape surveying, remote chemical analysis, close-up investigation, and caching compelling samples for potential return to Earth.
How Astronomers Search for Life on Exoplanets: A Guide to Biosignatures and Their Validation
Astronomers search for extraterrestrial life by identifying biosignatures in exoplanet atmospheres and on surfaces, but rigorous validation is crucial to distinguish true signs of life from abiotic processes. This involves analyzing the planetary context, host star properties, and atmospheric chemistry to rule out false positives.
Perseverance Finds Potential Biosignatures in Mars' Jezero Crater
On July 18, 2024, NASA's Perseverance rover discovered a red rock in Mars' Jezero Crater scattered with distinct 'leopard spots' — a pattern that could indicate ancient microbial organisms.