本片是一部美国纪录片片，上映于2009-11-03，由Graham Townsley导演，由Zeresenay Alemseged/Michel Brunet/Peter de Menocal主演。
剧情简介：Where did we come from? What makes us human? An explosion of recent discoveries sheds light on these questions, and NOVA's comprehensive, three-part special, "Becoming Human," examines what the latest scientific research reveals about our hominid relatives.
Part 1, "First Steps," examines the factors that caused us to split from the other great apes. The program explores the fossil of "Selam," also known as "Lucy's Child." Paleoanthropologist Zeray Alemseged spent five years carefully excavating the sandstone-embedded fossil. NOVA's cameras are there to capture the unveiling of the face, spine, and shoulder blades of this 3.3 million-year-old fossil child. And NOVA takes viewers "inside the skull" to show how our ancestors' brains had begun to change from those of the apes.
Why did leaps in human evolution take place? "First Steps" explores a provocative "big idea" that sharp swings of climate were a key factor.
外文名：Becoming Human: First Steps
别名：Becoming Human Part 1: First Steps / PBS "NOVA" Becoming Human
类型：纪录片 / 传记
地区：美国
导演：Graham Townsley
编剧：Graham Townsley / Jennifer Beman White
演员：Zeresenay Alemseged / Michel Brunet / Peter de Menocal
