The search for Martian life
Chapter 1
The watery past of Mars
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Chapter 2
Robotic detectives on the red planet
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Chapter 3
Biosignatures and the clues of life
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Chapter 4
Earthly twins and extreme environments
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Chapter 5
Bringing Mars back to Earth
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YOUR GOAL
Master of The search for Martian life
Ch 1 · The watery past of Mars
teacher Jezero Crater was once a deep blue lake, and we are searching through the clay for ancient life!
Fun Fact
Martian blue sunsets: Sunsets on Mars look blue because fine dust particles let blue light penetrate the atmosphere more efficiently than longer-wavelength red light.
Glossary
delta (noun)
A triangular deposit of sediment at the mouth of a river. The Perseverance rover landed at Jezero Crater in 2021 to explore its ancient dry river delta.
A triangular deposit of sediment at the mouth of a river. The Perseverance rover landed at Jezero Crater in 2021 to explore its ancient dry river delta.



