3steps from the big bang
117things can go into it
road
SystemPlace
The Romans built about 80,000 km of paved roads.
First appearedc. 4,000 BCE
Made Of
Everything is made of something.← What it takes
What it leads to →
Goes into
The Romans built about 80,000 km of paved roads.
From the big bang to road
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
Lilithium13.8 bn yrs ago
concretec. 300 BCE
roadc. 4,000 BCE