The Power of a Decade
Like Duolingo, but for The Power of a Decade. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 26 levels across 3 sections, about 52 minutes end to end, roughly 10 days at five minutes a day. It moves through How You Change, How the World Changes, and Planning Your Future. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in The Power of a Decade
- Every tissue type has its own specific lifespan
- Most neurons in the cerebral cortex are never replaced
- High-friction areas like the gut regenerate faster than structural tissues
- The crystalline proteins in the eye lens are permanent
- Existing cells divide through mitosis to create replacements
- Stem cells act as a reservoir for specialized cell production
- Different tissues have specific lifespans based on their environment
- Identifying which specific body parts do not regenerate
- The varying rates of regeneration across different tissue types
- Synaptic pruning removes unused connections to increase efficiency
- Myelination coats axons to speed up signal transmission
- The brain transitions from high plasticity to specialized processing
- Reduced plasticity means fewer new synaptic connections can be easily formed
- Pruning eliminates the 'extra' neural pathways used for flexible phoneme recognition
- The sequence of brain maturation from flexibility to efficiency
- Why adult brains struggle more with new language acquisition
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives The Power of a Decade the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Why doesn't your entire body just refresh all its cells at the exact same time?
Get it right to open this lesson and 25 more in the app.
Where The Power of a Decade takes you
Discover how much the world can change in just ten years. From your own body's growth to the way technology transforms our daily lives, explore the magic of a decade.
- 1
How You Change
- Your Body's New Cells
- How Your Brain Matures
- The Way Your Taste Buds Shift
- Why Your Memories Fade and Change
- 2
How the World Changes
- When New Gadgets Become Normal
- How Cities Grow and Expand
- The Way Language and Slang Evolves
- How Nature Heals or Changes
- The Cycle of Fashion Trends
- How We Travel Differently
- 3
Planning Your Future
- The Power of Small Daily Habits
- Setting Goals for the Long Run
- Looking Back to Move Forward
3 sections · 13 units · 26 levels. Built to play, not to enroll.
You pick the voice
The Power of a Decade is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start The Power of a Decade today.
Download Tomo, search The Power of a Decade, and play your first lesson in under a minute.