Ex4 p66 Watch the video again and complete the sentences. 1 The Atacama Desert in South America is one of the and places on Earth.

2 About years ago, workers from a nearby town were digging in the sand here when they found bones. Human bones.

3 When they lived here, in the Ilo Valley, between 900 and AD, everything would have looked very different.

4 At that time, there may have been as many as people living here.

5 Archaeologists have found gold artefacts in some of the graves, suggesting that their owners were very and people.

6 Some of the hats that archaeologists have found have beautiful feathers. The feathers of .​

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