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8 dez 2400 ano antes da era comum - Dust Abacus

Descrição:

Lines in dust and pebbles were used as an early abacus.

Adicionado na linha do tempo:

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ByPiston Phantom

10 out 2018

0

0

364

Data:

8 dez 2400 ano antes da era comum

Agora

~ 4429 years ago

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