Probability theory and steam locomotive: what they have in common

1. Step 1. Probability theory — evolved from — Dice. Problems about games of dice (Pascal, Fermat).
2. Step 2. Dice — is made of — Bone. Ancient dice were carved from animal bones.
3. Step 3. Bone — is material for — Needle. The first needles with an eye were carved from bone.
4. Step 4. Needle — is part of — Sewing machine. A needle with the eye near its point.
5. Step 5. Sewing machine — has part — Crank. A crank turns rotation into the stroke of the needle.
6. Step 6. Crank — is part of — Steam locomotive. Connecting rods and cranks carry the piston stroke to the wheels.

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