In calculus, the word limit has a specific meaning.
Threshhold, boundary, line in the sand, irreducible, barrier
Milestone, breakthrough
Atom = uncut, uncuttable, atomism
Plank's Constant = the smallest unit of energy
The four-minute file.
Faulty Thinking
Speed of light
Sound barrier
zero energy 0° kelvin
uncertainty principle
copernicus, heliocentric vs geocentric universe
resistance to change
hypothesis vs speculation
the singularity
Surfing Weimea Bay
temperature of solid, liquid, gas for each element