Cannon carriage e needle: o que têm em comum

1. Passo 1. Cannon carriage — faz parte de — Canhão. A carriage used as a support.
2. Passo 2. Canhão — evoluiu de — Hand cannon. A large hand cannon.
3. Passo 3. Hand cannon — evoluiu de — Lança de fogo. A metal barrel instead of bamboo.
4. Passo 4. Lança de fogo — evoluiu de — Spear. The fire lance was a spear with a tube of gunpowder — the first step to firearms.
5. Passo 5. Spear — tem como parte — Stone tool. Early spearheads were made of stone.
6. Passo 6. Stone tool — evoluiu para — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.

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