I'd like to take a shit on a newly formed planet's landmass, just one turd including the microbiome of my gut's ecosystem, come back billions of years later and see Earth's duplicate with humans wondering who shat that godly shit. Just to see humans wondering.
Edit:// What for? You might be wondering.
Organism food in, organism crap out. Disney circle of life. Consequently, the organic material of feces is the umbilical chord that nourishes its microbiome giving birth to life and as it flourishes then in the end perishes.
It's not the end either, at least one turd will survive nuclear war and biological warfare ensures that humans evolving once more in billions of years think they're the first civilization again after ours erodes to dust just as mountains do. Life will be here long after fossils disintegrate. Without a trace at different time.
If anything, radiation increases rate of mutation. Turds evolve faster, only one required to restart life.