Chapter 1: "Their arms are so long that both gibbons and orangutans often walk on the ground or on the tops of branches bipedally, with their arms held above their heads." Female silvery gibbon Pangrango balances with her four week-old baby on ropes in their compound. Hellabrun Zoo, Munich. AP Photo.

Baby balancing act! Mother gibbon takes her offspring for a tightrope walk on the wild side

Female silvery gibbon Pangrango (Hylobates moloch) balances with her four week-old baby on ropes in their compound at the Hellabrunn zoo in Munich, southern Germany, Friday, Sept.

From the Simons PNAS paper. Comparison of female (Left) and male (Right) crania of Aegyptopithecus zeuxis, with unassociated mandibles. Female cranium is CGM 85785; mal...

From the Simons PNAS paper. Comparison of female (Left) and male (Right) crania of Aegyptopithecus zeuxis, with unassociated mandibles. Female cranium is CGM mal.

A remarkable female cranium of the early Oligocene anthropoid Aegyptopithecus zeuxis (Catarrhini, Propliopithecidae) Simons, Elwyn L. 2007. PNAS vol. 104, no. 21, 8731-8736.

A remarkable female cranium of the early Oligocene anthropoid Aegyptopithecus zeuxis (Catarrhini, Propliopithecidae) Simons, Elwyn L. PNAS vol.

Aegyptopithecus face (University of Zurich)-2.JPG

Aegyptopithecus face (University of

File:Oreopithecus bambolii 1.JPG

A new study has found that a to ape from Italy did not, in fact, walk habitually on two legs. The findings refute a long body of evidence, suggesting that Oreopithecus had the capabilities for bipedal (moving on two legs) walking.

GSP 15000 Sivapithecus

Search Results for Sivapithecus

Nacholapithecus+KNM+BG+35320.png 400×282 pixels

Nacholapithecus+KNM+BG+35320.png 400×282 pixels

Geomagnetic Polarity Timescale

Geomagnetic Polarity Timescale

From Hapwood. 1a54c3612e96ac7768cc814c94c46c23.jpg 588×346 pixels

From Hapwood. 1a54c3612e96ac7768cc814c94c46c23.jpg 588×346 pixels

Dendropithecus - Bing Images

Dendropithecus - Bing Images

Brain, Size and Gender Surprises in Latest Fossil Tying Humans, Apes and Monkeys. Elwyn Simons of Duke with the 1966 male skull of Aegyptopithecus and a more recent female skull, showing sexual dimorphism. Photo by Megan Morr.

Elwyn L. Simons Primate Specialist Who Discovered Early Human Forebears Dies at 85

Image for Chapter 1 to show gorillas using flexible hips to spread weight around in a tree. Caption could say how much a silverback weighs. Photo by Ian Nichols.

Western lowland gorilla hierarchy plays out in the treetops.

Reconstruction of the skeleton of Proconsul. Museum of Athropology, Irchel campus, University of Zurich. Photo by Guérin Nicolas.

Early ape's remains discovered in its habitat in Kenyan island give clues to primate development

Brody's 1945 mouse-to-elephant curve

Brody's 1945 mouse-to-elephant curve

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