Odometer e needle: o que têm em comum

1. Passo 1. Odometer — tem como parte — Gear. Gear counters.
2. Passo 2. Gear — faz parte de — Lawn mower. The wheels turn the blade cylinder through gears.
3. Passo 3. Lawn mower — evoluiu de — Sickle. Mechanized mowing.
4. Passo 4. Sickle — evoluiu de — Stone tool. The first sickles had flint inserts.
5. Passo 5. Stone tool — evoluiu para — Needle. Bone needles with an eye are part of the Palaeolithic toolkit.

Abrir Evothings