Woolly Mammoth
Mammuthus primigenius · Pleistocene · Smithsonian NMNH
Extinct for 4,000 years. Taller than your doorway. Your students can stand beneath the tusks — and every one of them gets their own.
HEIGHT ≈ 3.2 m at shoulder
SCALE 1 : 1 · locked to true size
Apollo 11 Command Module
Crewed lunar mission · July 1969 · Smithsonian NASM
The only part of the spacecraft that came home. It carried three people to the Moon — and it just barely fits between your desks.
DIAMETER ≈ 3.9 m · HEIGHT ≈ 3.2 m
SCALE 1 : 1 · locked to true size
The Beating Heart
Full cardiac cycle · ≈ 70 beats per minute at rest
Every student has one. None of them has ever walked around one. Enlarged ten times and beating in the middle of the room.
TRUE SIZE ≈ 12 cm tall
PRESENTED 10 : 1 — enlarged for study
Heart model via Sketchfab community (CC-BY) — artist credit below.