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This timeline of the Big Bang shows a sequence of events as currently theorized by scientists.
It is a logarithmic scale that shows 10 ⋅ log 10 {\displaystyle 10\cdot \log _{10}} second instead of second. For example, one microsecond is 10 ⋅ log 10 0.000001 = 10 ⋅ = − 60 {\displaystyle 10\cdot \log _{10}0.000001=10\cdot =-60}. To convert −30 read on the scale to second calculate 10 − 30 10 = 10 − 3 = 0.001 {\displaystyle 10^{-{\frac {30}{10}}}=10^{-3}=0.001} second = one millisecond. On a logarithmic time scale a step lasts ten times longer than the previous step.