8 дек 2000 г. до нашей эры - Wheeled vehicles.

Описание:

Wheeled vehicles were so important because before you would have to ride a horse and not be able to carry a lot of thing but now you can have a horse pull you in a carriage with all of you items you need to carry. Also if you have a very heavy object you used to have to have many people carry it but now you can put it on wheels and push it.

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