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