<P> This is the timeline of the Universe from Big Bang to Heat Death scenario . The different eras of the universe are shown . The heat death will occur in 10 years, if protons decay . </P> <P> Usually the logarithmic scale is used for such timelines but it compresses the most interesting Stelliferous Era too much as this example shows . Therefore, a double - logarithmic scale s (s * 100 in the graphics) is used instead . The minimum of it is unfortunately only 1, not 0 as needed, and the negative outputs for inputs smaller than 10 are useless . Therefore, the time from 0.1 to 10 years is collapsed to a single point 0, but that doesn't matter in this case because nothing special happens in the history of the universe during that time . </P> <Dl> <Dd> s = (log 10 ⁡ log 10 ⁡ y e a r if y e a r> 10, corresponding to y e a r = 10 10 s 0 if 0.1 ≤ y e a r ≤ 10 − log 10 ⁡ (− log 10 ⁡ y e a r) if y e a r <0.1, corresponding to y e a r = 10 − 10 − s (\ displaystyle s = (\ begin (cases) \ log _ (10) \ log _ (10) year& (\ mbox (if)) year> 10 (\ mbox (, corresponding to)) year = 10 ^ (10 ^ (s)) \ \ 0& (\ mbox (if)) 0.1 \ leq year \ leq 10 \ \ - \ log _ (10) (- \ log _ (10) year) & (\ mbox (if)) year <0.1 (\ mbox (, corresponding to)) year = 10 ^ (- 10 ^ (- s)) \ end (cases))) </Dd> </Dl>

Graphical timeline from big bang to heat death