The whites of your eyes are not an accident. They are, scientists now believe, one of the most sophisticated social ...

Why the Latest Science Leads Us to a New Theory of Human Nature, by Jonathan Leaf (Bombardier, 320 pp., $21) Ever since Darwin, biologists have believed that much could be learned about human nature ...

BUFFALO, N.Y. ­­ ­ ­­— Saliva is a bodily fluid most of us take for granted despite the significant roles it plays: aiding in digestion, maintaining strong teeth and defending against oral disease.

You might find the lemur mongoose in Madagascar and the raccoon in the deciduous forests of North America, but they have one important thing in common: both species spend a lot of time climbing trees.

Phylogeny and ecology -- Habitat and locomotion -- Food -- Predation -- Interspecific relations -- Why be social? -- Group range, size, and structure -- Learning and instinct -- Communication -- ...

Adaptation, evolution, and systematics -- The primate body -- Primate lives -- Prosimians -- New World anthropoids -- Old World monkeys -- Apes and humans -- Primate communities -- Primate adaptations ...