Sources:
On Greece and the atom:
https://en.wikipedia.org/wiki/Icarus
https://en.wikipedia.org/wiki/Atomism
https://en.wikipedia.org/wiki/Atomic_theory
On elementary particle physics:
https://physics.info/standard/
http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/parcon.html
On smol burd:
http://www.guinnessworldrecords.com/world-records/smallest-bird