Wheel
To invent a wheel
70 ✓ September 18th, 2020
100.0% · Common
Alphabet
To invent the principle of the alphabet
70 ✓ September 18th, 2020
100.0% · Common
Transistor
To invent the First Transistor
100 71.9% · Common
🔐 Internet
To invent the Global Internet
100 71.2% · Common
Penicillin
To invent a Penicillin
90 74.0% · Common
Electric Light
To invent an Electric Light
90 79.1% · Common
Wireless Communication
To invent a Wireless Communication
90 76.4% · Common
Gunpowder
To invent the Gunpowder
80 92.1% · Common
Printed Books
To invent a Printed Books
80 88.5% · Common
Compass
To invent the Compass
80 84.7% · Common
Steam Engine
To invent the Steam Engine
80 81.5% · Common
Windmill
To invent the Windmill
70 99.4% · Common