Ambulância aérea e electrical telegraph: o que têm em comum

1. Passo 1. Ambulância aérea — utiliza — Avião. Aeroplanes.
2. Passo 2. Avião — inclui — Wright Flyer. The first aeroplane.
3. Passo 3. Wright Flyer — utiliza — Railway track. The Flyer had no wheels: it took off along a wooden rail.
4. Passo 4. Railway track — inspirou — Time zones. Introduced because of railway timetables.
5. Passo 5. Time zones — utiliza — Electrical telegraph. Synchronizing time by telegraph.

Abrir Evothings