4steps from the big bang
116things can go into it
siemens reactor
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Thin silicon rods glowing at about 1,100 °C slowly grow fat as pure silicon settles on them from a gas.
First appearedc. 1955 (71 yrs ago)
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Thin silicon rods glowing at about 1,100 °C slowly grow fat as pure silicon settles on them from a gas.
From the big bang to siemens reactor
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
copper wiredate unknown
siemens reactorc. 1955