UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Ibihe
Ibishushanyo 1.503 birahari • Ibyiciro bito 17
Reba Ibyiciro Bito
Abanyaviking
Abaroma
Abanyamisiri
Ubugereki bwa Kera
Igihe cya Edo
Mbere y'Amateka
Kera
Ibihe byo Hagati
Kigezweho
Nyuma ya Kigezweho
Industry 1.0 — Steam & Mechanization (1760)
Industry 2.0 — Electricity, Steel & Oil (1870)
Industry 3.0 — Assembly Line & Mass Production (1913)
Industry 4.0 — Computers & Digital Automation (1960)
Industry 5.0 — Open Knowledge & AI Collaboration (2026)
Renaissance (1400–1600)
Scientific Revolution (1600–1760)
Ibishushanyo (1.503)

Perfect Numbers — Find the Numbers That Equal Their Own Parts
na Mark
Kera
21
0
0
0
0
0

Heron's Square Roots — Fold a Rectangle Toward a Square
na Mark
Kera
22
0
0
0
0
0

Euclid's Algorithm — Find the Biggest Shared Measure with Paper Strips
na Mark
Kera
23
0
0
0
0
0

Sieve of Eratosthenes — Hunt Prime Numbers on a Grid
na Mark
Kera
21
0
0
0
0
0

Building Leonardo da Vinci's Armored Car — The Ancestor of the Tank
na Emma
Renaissance (1400–1600)
29
0
0
0
0
0

Building Leonardo da Vinci's Ornithopter — The Flapping-Wing Flying Machine
na Emma
Renaissance (1400–1600)
48
0
0
0
0
0

Proving the Pythagorean Theorem by Cutting Squares — a² + b² = c²
na Mark
Kera
32
0
0
0
0
0

Building Leonardo da Vinci's Revolving Bridge — The Swing Bridge for a Marching Army
na Emma
Renaissance (1400–1600)
26
0
0
0
0
0

Building Leonardo da Vinci's Self-Propelled Cart — The First Programmable Robot
na Emma
Renaissance (1400–1600)
25
0
0
0
0
0

Building Leonardo da Vinci's Aerial Screw — The Ancestor of the Helicopter
na Emma
Renaissance (1400–1600)
32
0
0
0
0
0

Measuring the Earth from a Single Mountain — Al-Biruni's Horizon-Dip Method
na Astro
Ibihe byo Hagati
35
0
0
0
0
0

Measuring Pi — Archimedes' Method of Squeezing a Circle Between Polygons
na Mark
Kera
29
0
0
0
0
0

The Law of the Lever — Archimedes' Balance of Weight and Distance
na Martin
Kera
37
0
0
0
1
0

Akaga
Testing a Gold Crown with Water — Archimedes' Buoyancy and the Eureka Method
na Penny
Kera
36
0
0
0
0
0

Measuring How Far the Sun Is Compared to the Moon — Aristarchus' Half-Moon Method
na Astro
Kera
37
0
0
0
0
0

Measuring the Height of a Pyramid by Its Shadow — Thales' Similar Triangles
na Mark
Kera
67
0
0
0
0
0

Building Leonardo da Vinci's Parachute — The Sealed Linen Pyramid of 1485
na Emma
Renaissance (1400–1600)
30
0
0
0
0
0

Measuring the Circumference of the Earth — Eratosthenes' Shadow Method
na Astro
Kera
23
0
0
0
0
0

Tablet Weaving a Patterned Band — Card Weaving the Trim of the Viking World
na Tex
Ibihe byo Hagati
27
0
0
0
0
0

Nalbinding a Wool Sock in the Oslo Stitch — The Looped Fabric Before Knitting
na Tex
Ibihe byo Hagati
35
0
0
0
0
0