Cold desert. Thin air. Giant volcanoes. Ancient river clues. ARQSI and ARQSA cross the red frontier to learn why a dry planet can still carry a record of water.
Age-band production: written specifically for ages 6–9 as a visual science-adventure comic. Dialogue, terrain maps, rover-scale comparisons and fact cards share the narrative load. This Mars issue advances the Solar System story rather than recycling the Earth manuscript.
Mars rolls into view, rust-red with a white polar cap. ARQSA: “No blue oceans.” ARQSI: “Not now.”
Ancient valley lines appear on the scan. ARQSA: “Then the rocks are keeping a memory.”
ARQSI magnifies dust grains. “Iron minerals in Martian rocks reacted with oxygen and helped make rusty iron oxides.”
ARQSA: “So the colour is chemistry spread across a planet.”
The ship samples the atmosphere. ARQSI: “Very thin. Mostly carbon dioxide, with nitrogen and argon.”
ARQSA watches heat escape after sunset. “Thin air does not hold warmth like Earth’s atmosphere.”
Day and night temperature bars swing widely. ARQSA: “Sunlight warms the ground, then the heat escapes quickly.”
ARQSI: “Mars can be bitterly cold. Exploration needs insulation, power and careful planning.”
A volcano rises across the horizon. ARQSA zooms out. And out again. “That mountain keeps going.”
ARQSI: “Olympus Mons is the largest volcano in the Solar System—enormous in both height and width.”
The map traces Valles Marineris, a vast canyon system stretching thousands of kilometres.
ARQSA: “Earth’s Grand Canyon would fit inside only a small part of this.” ARQSI: “Scale changes what words like ‘large’ mean.”
Branching channels cut across ancient terrain. ARQSA: “These shapes look like water carved them.”
ARQSI: “Many did. Mars preserves ancient valley networks, deltas and lakebeds.”
They examine a crater floor with layered sediments. ARQSI: “Rovers have found rocks deposited in ancient lake environments.”
ARQSA: “No lake today. Evidence of a lake before.”
Polar caps and subsurface maps glow on the display. ARQSI: “Mars still has water—mostly frozen as ice.”
ARQSA: “But the surface pressure and temperature make stable liquid water difficult today.”
A local dust plume grows across several orbital frames. ARQSA: “Wind in thin air can still move huge amounts of dust.”
ARQSI: “Some Martian dust storms expand across very large regions, sometimes much of the planet.”
Phobos and Deimos appear as irregular shapes. ARQSA: “Not round like Earth’s Moon.”
ARQSI: “Mars has two small moons. Phobos orbits closer; Deimos travels farther out.”
Orbiters, landers and rovers appear in a timeline. ARQSA: “Robots can work where humans cannot safely walk.”
ARQSI: “They image terrain, drill rocks, measure weather and test ideas before the next mission.”
ARQSI highlights an ancient lakebed. “A place can once have had conditions suitable for microbes without proving microbes lived there.”
ARQSA: “So we separate the question: could life survive there—from: did life exist there?”
Layered stone fills the screen. ARQSA: “One rock can record water, wind, chemistry and time.”
ARQSI: “And one exciting clue is not the same as a final conclusion. Science checks alternatives.”
ARQSA records: “Red iron-rich dust. Thin carbon-dioxide atmosphere. Cold desert. Giant volcanoes and canyon. Ancient rivers and lakes. Water ice today. Two moons.”
ARQSI adds: “Mars teaches us that planets change—and rocks remember.”
Mars shrinks behind the ship. Ahead, a striped globe grows enormous. ARQSA: “That is not a rocky world.”
ARQSI: “Next: Jupiter.” Caption: “ISSUE 05 — JUPITER: THE GIANT STORM WORLD.”
Reader prompts: What evidence can reveal an ancient lake after the water is gone? Why does thin air affect temperature and human exploration? What is the difference between “habitable” and “inhabited”?