Description

Timeline of the universe. Step 1 'Big Bang (t=0)': NOT an explosion IN space - it's the rapid expansion OF space itself. All energy in an incredibly hot, dense state. No 'before' or 'outside' (spacetime itself begins). Step 2 'First 3 minutes': t=10⁻⁴³s: Planck epoch (all forces unified?). t=10⁻³⁶s:

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