Timeline of the Universe · event

Proton Decay, If It Happens

≈ 10³⁶ years, if at all · Far Future

Temperature (K)
1e-14
When
≈ 10³⁶ years, if at all
Redshift
—
Era
Far Future
Seconds After Big Bang
3.155693e+43

What Happened

Grand unified theories predict the proton decays, with a lifetime now known to exceed 10³⁴ years. Experiments have watched tens of thousands of tonnes of water for decades and seen nothing, so this entry may simply never occur.

Researchers

Equations

Theories

Referenced by

equation
researcher
theory

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From the Cosmic Timeline database in Notion, last edited 2026-08-16. This page is the row, rendered by the build; nothing on it is written by hand.