Printable case study kit
The Twin Experiment
Twins on Mars and Earth feel time differently while aging the same biologically.
Mars vs Earth · Medium · 13 min read
Read the story: /vignettes/twin-experiment
📄 Student worksheet
After reading “The Twin Experiment,” complete the tasks below. Use the story, sidebar metrics, and Mars vs Earth time facts.
- Summarize the main conflict in “The Twin Experiment” in 2–3 sentences.
- Pick one metric from the case study sidebar and explain why it matters to the characters.
- Name one habit from Earth that would NOT work on Mars vs Earth without change.
- Propose one new rule, ritual, or invention colonists might adopt.
| Concept from story | Earth habit | On-world change | Your solution |
|---|---|---|---|
Try the planetary age calculator with your birthdate. Open calculator →
🎤 5-minute read-aloud script
Read aloud in class or at home (~5 minutes).
Today we are exploring The Twin Experiment from Time Across the Solar System.
Remember: a year is one trip around the Sun, and a day is how long a world spins—or how long the Sun takes to cross the sky.
Same biology, different calendars—twins can feel different ages while cells age equally.
As you listen, picture how characters must plan ahead because clocks and seasons do not match Earth.
Time perception is cultural and orbital; clocks tell more than one true story.
Discuss with someone nearby: what surprised you most, and what would be hardest for you?
Visit tatssp.com/calculator to see your own age on different worlds.
📊 Timeline & metrics (printable)
- 👯 Year 0 — Separation: One twin departs for Mars
- 📹 Year 5 — Video reunion: Different holiday rhythms
- 🌍 Year 10 — Reunion on Earth: Compare journals and birthdays
- 🔬 Debrief — Science summary: Biological age vs felt age
🗣️ Discussion guide
Time perception is cultural and orbital; clocks tell more than one true story.
For Parents
- What would surprise you most about life in this story?
- How would you explain local time to a child?
For Educators
- What science topics does this story illustrate?
- How could students model this planet’s day/year?
For Students
- Would you want to live where this story is set? Why?
- What habit would be hardest to change?