4steps from the big bang
116things can go into it
knife
ProductTool
The oldest stone knives are over 2.5 million years old, older than our species.
First appearedDate not yet known
Made Of
Everything is made of something.← What it takes
What it leads to →
Used to make
The oldest stone knives are over 2.5 million years old, older than our species.
From the big bang to knife
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
knifedate unknown