4steps from the big bang
116things can go into it
wheel
ComponentPart
The wheel was invented about 5,500 years ago, surprisingly late. Potters may have used it before carts did.
First appearedc. 3,500 BCE
Made Of
Everything is made of something.← What it takes
What it leads to →
Goes into
The wheel was invented about 5,500 years ago, surprisingly late. Potters may have used it before carts did.
From the big bang to wheel
The most direct chain from the start of the universe, following what things are made from and, for living things, what they evolved from. Each step shows when it first appeared.
big bang13.8 bn yrs ago
Hehelium13.8 bn yrs ago
CO2 laser1964
steelc. 1,800 BCE
wheelc. 3,500 BCE