Subway Maze: The Math of Tokyo's Trains
Ages 3–9
Key Insight
Tokyo's subway is an example of 'Slime Mold' optimization and complex scheduling math to avoid collisions and delays.
📖 Explanation
🧒 For Ages 3-5 (Simple Words)
The trains in Tokyo are like a giant clock. They always arrive at the exact second they are supposed to. It's a very big and fast puzzle!
🎒 For Ages 6-9 (Science Talk)
Graph Theory
Tokyo's rail network is a 'Graph' where stations are nodes and tracks are edges. Engineers use algorithms to find the shortest path. Interestingly, scientists found that slime mold grows in a pattern that matches Tokyo's efficient subway map!
❓ Frequently Asked Questions
- What happens if a train is late?
- It's rare! If a train is late by 5 minutes, you get a 'Delay Certificate' for your school or work.
🧪 Slime Mold Map (Advanced)
~168hGrow your own bio-subway map.
🛒 Supplies
📋 Steps
- 1
🧫 Agar Base
Set up an Agar plate with oat flakes placed where 'stations' would be.
- 2
🧠 Release the Slime
Place Physarum polycephalum (slime mold) and watch it find the most efficient route between oats.
Watch the Video
Visualizes how slime mold 'designed' the Tokyo railway system.
Subway Maze: The Math of Tokyo's Trains
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