Chapter 1
The watery past of Mars
Chapter 2
Robotic detectives on the red planet
Chapter 3
Biosignatures and the clues of life
Chapter 4
Earthly twins and extreme environments
Chapter 5
Bringing Mars back to Earth
YOUR GOAL
Master of The search for Martian life
Ch 3 · Biosignatures and the clues of life
artiteacher Biosignatures
Signs of life! (Signs of life!) We found the spots on Cheyava Falls!
artiteacher Earth's oldest fossils show scientists what Martian microbial life might look like.
artiteacher Plumes of methane gas on Mars spark intense debate about underground life.
Fun Fact
Fossilized rock patterns: Stromatolites on Earth are built by blue-green algae and represent some of the oldest physical evidence of life on our planet.
Glossary
biosignature (noun)
Any substance, structure, or pattern that provides scientific evidence of past or present life. NASA's Perseverance rover collected Martian rock samples containing these potential organic markers at Jezero Crater.
Any substance, structure, or pattern that provides scientific evidence of past or present life. NASA's Perseverance rover collected Martian rock samples containing these potential organic markers at Jezero Crater.