Sykes explains the principles of genetics and human evolution, the particularities of mitochondrial genetics, and analyses of ancient DNA to genetically link modern humans to prehistoric ancestors.

• 赛克斯解释了遗传学与人类进化的原理，线粒体遗传学的特性，还有通过对古代DNA的分析来寻找现代人类与史前祖先的遗传关系。