Page 12: Research news on primates (order)

Primates are an order (Primates) of eutherian mammals characterized by a suite of derived traits associated with arboreal locomotion and enhanced sensory and cognitive capacities. Defining features include grasping extremities with opposable thumbs and, in many taxa, opposable great toes; nails instead of claws on most digits; a postorbital bar or plate; forward-facing orbits enabling stereoscopic vision; and a relatively enlarged brain, especially in regions mediating vision and complex behavior. The order encompasses strepsirrhines (lemurs, lorises), tarsiers, and haplorhine simians (monkeys and apes, including humans), and is a core model group in evolutionary biology, comparative anatomy, neurobiology, and behavioral ecology.

Nest‑building chimpanzees seem to anticipate future weather

Every evening, as they move from place to place through the forest, chimpanzees stop to build a nest—most often in a tree—to sleep in. Using a selection of branches, leaves and twigs, they create comfortable and safe spaces ...

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