Natural materials, such as wool and wood, come from living things or the ground. Synthetic materials, like plastic, are made from chemicals. Materials have different properties that make them ...

89 x 116.5 cm. (35 x 45.9 in.) Subscribe now to view details for this work, and gain access to over 18 million auction results. Purchase One-Day Pass ...

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Barrick Gold Chief Executive Officer Mark Bristow says the company is “making progress” in its dispute with Mali’s military regime, but the advances haven’t come as fast as expected.