Psychology & Psychiatry

Our pupil moves to the rhythm of the environment

When we find something particularly beautiful or impressive, we literally get big eyes: Our pupils dilate. The pupil controls how much light enters the eye and falls on the retina. When there is a lot of light, the pupil ...

Neuroscience

Controlling your home with the power of thought

Walking across the room to switch on a light—such a simple everyday activity involves enormously complex computations by the brain as it requires interpretation of the scene, control of the gait and planning upcoming movements ...

Neuroscience

Why monkeys choose to drink alone

Why do some people almost always drop $10 in the Salvation Army bucket and others routinely walk by? One answer may be found in an intricate and rhythmic neuronal dance between two specific brain regions, finds a new Yale ...

Neuroscience

How a penalty shootout is decided in the brain

A penalty shootout at the Soccer World Cup. All eyes are on the best striker of the team. He should take the decisive shot, preferably past the goalkeeper. The striker must decide whether to aim for the right or left corner ...

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Monkey

Cebidae Aotidae Pitheciidae Atelidae Cercopithecidae

A monkey is any cercopithecoid (Old World monkey) or platyrrhine (New World monkey) primate. All primates that are not prosimians (lemurs and tarsiers) or apes are monkeys. The 264 known extant monkey species represent two of the three groupings of simian primates (the third group being the 21 species of apes). Monkeys are usually smaller and/or longer-tailed than apes.

The New World monkeys are classified within the parvorder Platyrrhini, whereas the Old World monkeys (superfamily Cercopithecoidea) form part of the parvorder Catarrhini, which also includes the apes. Thus, scientifically speaking, monkeys are paraphyletic (not a single coherent group), and Old World monkeys are actually more closely related to the apes than they are to the New World monkeys.

Due to its size (up to 1 m/3 ft) the Mandrill is often thought to be an ape, but it is actually an Old World monkey. Also, a few monkey species have the word "ape" in their common name.

This text uses material from Wikipedia, licensed under CC BY-SA