Writing in The Conversation, Professor Mark Maslin (UCL Geography) documents the journey of the remains of one of humanity's oldest-known ancestors to a new exhibit in Abu Dhabi. There is a special gallery inside the Natural History Museum Abu Dhabi where visitors slow down, lower their voices and often fall silent. In front of them, carefully lit and disarmingly small, lies the skeleton of Lucy, the 3.2 million-year-old hominin. Perhaps more than any other ancient relative, Lucy has challenged