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Anthropologist Philipp Gunz explains the process of virtual fossil reconstruction, a technique that can reverse the damage done to fossils by time and the elements. Anthropologist Katerina Harvati explains the rare convergence of circumstances that are necessary for the discovery of a fossil specimen. Anthropologist Jean-Jacques Hublin discusses the role of conflict and argument in the scientific process. Ice Stories correspondent Howie Koss interviews James Van Matre, Waste Management Supervisor at McMurdo Station. We talk about Antarctica's waste management practices of the past and present, and why it's important to recycle. Evolutionary geneticist Svante Pääbo explains that analysis of ancient Neanderthal DNA is very tricky work, thanks to fragmentation and contamination of genetic material. Is a single gene, FOXP2, the secret to human speech? Researchers discuss the genetic underpinnings of speech and language. Anthropologist Katerina Harvati explains how scientists from various disciplines work together to find fossilized human remains. Anthropologist Katerina Harvati explains the importance of cast collections to the study of human evolution. Various features of a fossil skull help anthropologists determine what species it belongs to. Here, anthropologist Katerina Harvati explains how a pencil can be used to distinguish between ancient human species. Some 35,000 years ago, Neanderthals became extinct. Climate change and a taste for steaks may be to blame. (Sound familiar?) Anthropologist Katerina Harvati explains.