NOVA scienceNOW What Makes Us Human? Preview0:30 Aired: 09/12/12 Rating: NR Find out if you’re part Neanderthal, about the evolution of laughter, and more. Add to WatchlistBuy this Video:iTunesBuy DVDShare:FacebookTwitterEmailGoogle PlusEmbed CodeEmbed Code×CloseNOVA scienceNOWWhat Makes Us Human? PreviewPremiere Date: Sept. 12, 2012, midnight Width px Height px Please copy this text to your clipboardProblems Playing Video ?Report a problemClosed CaptioningReport a Problem×CloseBefore you submit an error, please consult our Troubleshooting Guide.Type of ErrorVideo doesn't loadVideo loads, but doesn't playVideo jumps back/forwardOnly audio is streamingSponsorship playback errorOtherPlease add more detailsCancelSubmit ReportYour report has been successfully submitted. Thank you for helping us improve PBS Video.CloseEpisode LinksNOVA scienceNOW's "What Makes Us Human?" homepageE-mail NewsletterShop NOVA Funding for NOVA ScienceNOW is provided by the National Science Foundation and the Alfred P. Sloan Foundation.