Trust a fit only near its data

By age

1. Ages 3–5 Not made yet.
2. Ages 6–8 Not made yet.
3. Ages 9–14
   • A Century of Fast (Swimming)
4. Ages 15–18
   • Tobler’s Hill Rule (Hiking)
   • Why a Full Hall Rings Less (Music)
   • The Dog Clock (Pets)
   • Eight Rowers, Not Eight Times as Fast (Rowing)
   • Colder Higher Up (Weather)
   • Feels Like (Weather)
   • Colder in the Wind (Weather)

Meeting one idea in a second world is where it starts to belong to you, not to the world you met it in. These pages are a design, not a promise.