Lesson 5 of 5 · Mars 2020
Mars 2020: connect exploration, caching and flight
8 minute lesson · 3 checks along the way
Your goal for this lessonDistinguish Perseverance’s geological investigation, possible future sample return and Ingenuity’s technology demonstration.
In this lesson 3 sections · 3 checks
Using archive links & definitions
Follow a linked name to explore its archive card. “Back to your lesson” brings you to the same part of the reading.
Words with a dotted underline open a short definition right here in the lesson.
Read & understand
Explore a promising geological record
NASA’s mission launched in July 2020 and landed Perseverance in Jezero Crater in February 2021. JPL and collaborating instrument teams developed an investigation of past environments and possible signs of ancient microbial life. The rover studies rocks in context while collecting selected cores and other materials for possible later examination on Earth.
Perseverance inherited landing experience from Curiosity, with terrain-relative navigation improving its ability to assess hazards during arrival. Similar architecture does not mean identical scientific equipment or objectives. The mission connects close investigation with careful selection and documentation of samples, so a later analyst could relate a piece of rock to the place and conditions in which it was collected.
Check 1 of 3
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Read & understand
Keep the sample chain explicit
A cached sample is material collected and stored for possible later use. It is not a sample already delivered to an Earth laboratory. As of October 14, 2026, NASA describes Perseverance’s collection as intended for potential future retrieval; a return would require additional missions and decisions. Collection and return must therefore remain separate milestones.
Imagine choosing a fictional core from an interesting layered rock. Record its location, target observations, collection history and any contamination controls relevant to interpretation. Those records help a later laboratory distinguish the sample’s original geological clues from changes introduced during handling. A promising chemical or textural feature still requires tests of nonbiological alternatives before it becomes evidence strong enough for a life claim.
Perseverance descends toward Mars on February 18, 2021. This cropped NASA video still was captured by a camera on the descent stage. It shows the rover suspended above the surface, providing direct flight evidence of the landing architecture discussed in the lesson.
Look closely
What distinguishes this view from a preflight illustration of the same maneuver?
See what to notice
Its acquisition comes from a flight camera during the actual descent. A design illustration explains an intended arrangement but does not document the flight event.
Mars 2020 Perseverance carried Ingenuity to Mars beneath the rover. This April 2020 ground-integration photograph shows the compact helicopter attached to the larger vehicle. It documents preparation before launch, not one of the later controlled flights in the Martian atmosphere.
Look closely
How can two photographs of the same mission represent different evidence?
See what to notice
Ground integration records hardware preparation, while a descent-stage camera records a flight event. Both are useful when their dates, platforms and phases remain explicit.
Check 2 of 3
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Read & understand
Recognize the separate helicopter demonstration
Ingenuity traveled to Mars attached beneath Perseverance and first flew in April 2021. The small helicopter demonstrated powered, controlled flight in the thin atmosphere, then supported additional operational experiments and scouting. It completed 72 flights, with its last flight in January 2024. Its flight history is a distinct result within the broader expedition.
A helicopter image and a rover rock measurement answer different questions. Aerial views can reveal routes or terrain relationships; close-contact instruments examine selected materials in other ways. In a mission comparison, ask what each platform enabled, what it actually measured and which objectives it completed. Neither successful flight nor the collection of a sealed core guarantees the outcome of a future sample-return mission.
Check 3 of 3
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Put it together
Your lesson progress
Each check connects to a part of the story. Complete all 3 to earn your 25-point lesson bonus.
Explore further · Optional
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Explore the evidence behind this lesson. These optional readings and videos open in a new tab.
- Read: NASA: Mars 2020 mission overviewReviewed October 14, 2026. Collected samples are intended for possible future return; collection is not delivery to Earth.
- Read: NASA: Perseverance science and sample collectionCompare the explanation and its assumptions with the worked example in this lesson.
- Read: NASA: Ingenuity flight historyThe last flight was January 18, 2024; mission completion was announced later that month.
- Read: NASA/JPL: why the sky crane was developedThe August 2024 retrospective explains engineering choices. Local landing dates differ from UTC dates by one calendar day.