pitch and pent: the rooftop illusion demonstrated by Kolichi Sugihara of the Meiji Institute for Advanced Mathematics
making sense of scents: the olfactory capacities are underestimated—via Messy Nessy Chic
have fun storming the castle: The Princess Bride re-enacted in its entirety as home movies under lock-down
matinee at the bijou: the Internet Archive (see previously) has digitally curated a massive cinematic history library
pyrophone: a flame organ that amplifies the tones of vibrating, burning hydrogen
10100:an individual engineers an analogue, modular calculator (see also) to count up to a googol