"Unit 1 Great Scientists Unit 2 Great Explorers Unit 3 Australia Unit 4 Feeding the World Unit 5 The Power of Advertising Unit 6 Revisi N_Unit 7 Man-made Wonders Unit 8 People of Great Determinati N_Unit 9 Great Athletes Unit 10 Lies, Tricks and Decepti N_Unit 11 Playwrights and Doctors Unit 12 Revision"