4steps from the big bang
115things can go into it
saw
ProductTool
The teeth of a saw are bent slightly outwards so the blade doesn't jam in the cut.
First appearedDate not yet known
Made Of
Everything is made of something.← What it takes
What it leads to →
The teeth of a saw are bent slightly outwards so the blade doesn't jam in the cut.
From the big bang to saw
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
sawdate unknown