PHASES OF THE MOON
eight phases · a full cycle of 29.53 days
SERUM ACTIVES
when to apply, what to keep apart in time, what the season changes
BITS, BYTES, KILOBYTES
two scales · 1000 and 1024 · why a drive looks smaller
HTTP STATUS CODES
five classes · twenty codes you meet every day
POST-FERMENTED TEAS
six teas changed by microbes rather than oxygen
MATCHA DRINKS
six proportions · grams, millilitres, degrees
PUERH AGEING
sheng and shu · what the years do and when to drink
BLACK TEA
grades, six leaves and four blends · in China it is "red tea"
TEA PLANT CULTIVARS
assamica against sinensis · leaves at one scale · six cultivars
GREEN TEA
six leaves · water, time, number of steepings
OOLONG
from 15 to 80 % oxidation · leaf shape · seven steepings
SIX KINDS OF TEA
one plant · the oxidation scale · seven processing steps
THE HAMBURGER
the ratios of the mince and the five steps that decide the result
GREEK ALPHABET
24 letters · names and where science uses them
ROMAN NUMERALS
seven symbols · ones, tens, hundreds · years
THE VERTICAL PLANET
from the Challenger Deep to the summit of Everest · one scale, nothing compressed
THE TREE OF LIFE
who sits inside whom · where animals, fungi and plants actually are
PAPER SIZES
the A series · from A0 to A6
SI PREFIXES
from quetta to quecto · twenty multipliers