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 .​