TV NOVA - Season 33 Episode 18 : Family That Walks on All Fours NOVA - Season 33 Episode 18 : Family That Walks on All Fours 7.008/10 by 131 users This episode focuses on a scientific debate about five siblings in a Turkish family who walk on all fours. When, in 2005, scientist Uner Tan labeled them "genetic throwbacks," they became part of the dialogue about a possible missing link to an era when humans walked on all fours. Included: comments from geneticist Sean Carroll and anthropologist Brian Richmond, who disagree with Tan; and interviews with and footage of the family. Details Casts Posters Images Title NOVA - Season 33 Episode 18 : Family That Walks on All Fours Alternative Titles PBS新星Nova, نوا, نووآ, PBS Nova First Air Date 1974-03-03 Last Air Date 2025-09-24 Number of Episodes 1012 Number of Seasons 52 Genres Documentary, Networks PBS, Casts Plot Keywords , Episodes List NOVA Season 33 :Episode 1 Mystery of the Megaflood Mystery of the Megaflood 2005-09-20 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 2 Sinking the Supership Sinking the Supership 2005-10-04 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 3 Einstein's Big Idea Einstein's Big Idea 2005-10-11 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 4 Volcano Under the City Volcano Under the City 2005-11-01 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 5 Hitler's Sunken Secret Hitler's Sunken Secret 2005-11-08 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 6 Newton's Dark Secrets Newton's Dark Secrets 2005-11-15 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 7 Storm That Drowned a City Storm That Drowned a City 2005-11-22 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 8 The Mummy Who Would Be King The Mummy Who Would Be King 2006-01-03 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 9 Deadly Ascent Deadly Ascent 2006-01-17 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 10 The Perfect Corpse The Perfect Corpse 2006-02-07 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 11 Jewel of the Earth Jewel of the Earth 2006-02-14 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 12 The Ghost Particle The Ghost Particle 2006-02-21 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 13 Arctic Passage Arctic Passage 2006-02-28 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 14 The Great Robot Race: Nova The Great Robot Race: Nova 2006-03-28 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 15 Voyage to the Mystery Moon Voyage to the Mystery Moon 2006-04-04 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 16 Dimming the Sun Dimming the Sun 2006-04-18 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 17 Wings of Madness Wings of Madness 2006-11-07 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 18 Family That Walks on All Fours Family That Walks on All Fours 2006-11-14 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 19 ScienceNOW: Extinction ScienceNOW: Extinction 2006-10-03 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and... NOVA Season 33 :Episode 20 Underwater Dream Machine Underwater Dream Machine 2006-12-26 PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA demystifies science and...