Subjectastronomy0body and care1code0drinks0food0language0maths1music0science1signals0sport4units0vehicles0
THE NAMES OF THE ASANAS
twenty foundational poses: Sanskrit, the searchable spelling, the English name — and how old each one is
US$1.50
BARBELL MATHS
the IWF colour code and the plate count: from target weight to each side of the bar, no calculator
US$2.50
TORQUE
why the same dumbbell grows heavier as the arm rises, and how to work it out in advance
US$2.50
THE BASKETBALL
four FIBA sizes with their circumference and mass — and why the rules set a bounce, not a pressure
Free
FOOTBALL: THE BALL
Law 2, three codes of the game, five sizes and three FIFA quality marks — what a ball must survive
US$2.50
BALLS BY THE RULES
eleven sports at true relative size — circumference, mass, pressure, and who sets them
Free
MARTIAL ARTS FAMILY TREE
fifteen schools and thirteen lines of transmission — every arrow is a documented apprenticeship, not a legend
US$1.50