Darts and stone tool: what they have in common

1. Step 1. Darts — is part of — Darts. Darts with flights.
2. Step 2. Darts — evolved from — Bow and arrow. Accuracy of shooting.
3. Step 3. Bow and arrow — is made of — Flint. Arrowheads were knapped from flint.
4. Step 4. Flint — is material for — Stone tool. Tools were knapped from flint and other rocks with a sharp fracture.

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