Yoke bows e LIGO: o que têm em comum

1. Passo 1. Yoke bows — faz parte de — Yoke. Bows that go around the animals’ necks.
2. Passo 2. Yoke — é utilizado em — Plough. It was pulled by oxen in a yoke.
3. Passo 3. Plough — evoluiu de — Hoe. The plough mechanized loosening the soil with a hoe.
4. Passo 4. Hoe — é feito de — Stone. The working part was of stone or antler.
5. Passo 5. Stone — é material para — Interferometer. Michelson’s instrument stood on a stone slab.
6. Passo 6. Interferometer — inclui — LIGO. An interferometer.

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