For a really good sense of what goes on at Categorically Not! Check out Clifford Johnson’s description here.
HOLES
STRINGS
UNCERTAINTY
FLUID DYNAMICS
GRAVITY WITH LEVITY
MIXTURES
POINT OF VIEW
SPACE EXPLORATION
MIRRORING
RESISTANCE
ATTRACTION
INTUITION
REALLY?
TRANSPARENCY
UNCERTAINTY REVISITED
APOCALYPSE
UNCERTAINTY REVISITED II
MOVEMENT
POINT OF VIEW, TOO
VULGARIZATION
YET ANOTHER P.O.V.
RECYCLING
MISTAKES
SMALL DIFFERENCES
INSIDE OUT
BEGINNINGS
SCIENCE GOES HOLLYWOOD
PUZZLES
LOOPS
AMBIGUITY