> t=0 Big Bang
-> t=10^-43 Quantum gravity dominates
--> t=10^-36 Unified fundamental forces
---> t=10^-32 Inflation drives expansion of space by factor of 10^26, forces split
----> t=10^-12 Forces separated, quark-gluon plasma forms
-----> t=10^-6 Quarks bind into hadrons, existing antimatter annihilated
------> t=1 Neutrino interaction essentially terminates
-------> t=10 Leptons, anti-leptons are in thermal equilibrium
--------> t=10^3 Nucleons form first nuclei, mostly hydrogen and helium-4
---------> t=10^12 Matter energy density exceeds radiation and dark energy, expansion of space decelerates
----------> t=10^13 Temperature drops sufficiently for electrons to bind to nuclei, first neutral atoms form. Universe ceases to be electromagnetically opaque.
-----------> t=10^16 First stars begin to form from hydrogen clouds
------------> t=10^17 Galaxies form, then coalesce into clusters, then superclusters.
-------------> t=9.2*10^17 Earth forms from solar protoplanetary disk
--------------> t=9.8*10^17 First single-celled organisms form from abiogenesis
---------------> t=1.13*10^18 First multi-cellular organisms arise, bacteria begin oxygen production
----------------> t=1.28*10^18 Earliest plant and animal life arises along with fungi.
-----------------> t=1.33*10^18 Complex lifeforms such as vertebrates dominate
------------------> t=1.34*10^18 Dinosaurs
-------------------> t=1.37*10^18 No more dinosaurs.
--------------------> t=1.38*10^18 Tom exists.
---------------------> t=1.38*10^18 + 7.88*10^8 Tom discovers key to immortality
----------------------> t=1.381*10^18 Tom discovers key to time travel
-----------------------> t=1.382*10^18 Tom has subjugated the human race
------------------------> t=1.4*10^18 Tom has driven humanity to the stars