A monkey is a long-tailed, medium-sized member of the order of Primates. The primate order also includes macaques, baboons, guenons, capuchins, marmosets, and tamarins. Monkeys today are a member of two of the three groups of simian primates, the New World monkeys and the Old World monkeys, of which there are 264 known species. Apes and chimpanzees are not scientifically classified as monkeys, a common misconception due to their physical similarities. Some distinguishing features between New World and Old World monkeys include the tail. Most New World monkeys have prehensile tails while Old World monkeys do not. The facial features of each group of monkeys also differ substantially; however, there are a number of shared features as well. Monkeys are a very diverse family of species, ranging in size from the 5-6 inch Pygmy Marmoset, to the adult male Mandrill, which can be 3 feet tall. Some monkeys spend the majority if their lives in treetops, while others call savannas and grasslands home. Most monkeys survive of a diet of fruit, leaves, nuts, berries, eggs, insects and they occasionally hunt other smaller animals.
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Why Earth's Largest Ape Went Extinct
gigantopithecus blacki statue
January 11th, 2016
The biggest ape to ever walk the Earth, Gigantopithecus blacki, may have died out because of its big size and limited diet, new research suggests.
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Howler Monkeys with Deeper Calls Have Smaller Balls
hooting male howler monkeys
October 22nd, 2015
It's a tough trade-off for male howler monkeys: a deeper voice, or more sperm?
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Are Big Brains Smarter?
an illustration of neurons in the human brain
February 3rd, 2016
Humans boast the biggest brains, relative to body size, in the animal kingdom.
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Tidy Monkeys Shed Light on Human Cleanliness
Japanese macaques eating
November 4th, 2015
Monkeys that are revolted by often disease-carrying things such as poop suggest that disgust drives cleanliness - and health.
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All Ears! What Human Ancestors' Hearing Was Like
hominin hearing
September 25th, 2015
Human ancestors that lived about 2 million years ago had hearing abilities similar to those of chimpanzees, but their ears had some slight differences that made their hearing more humanlike, a new study finds.
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HIV-Related Virus Has Existed in Primates for Millions of Years
African Monkey - Baby Kipunji
August 27th, 2015
Viruses related to the human immunodeficiency virus (HIV) have infected Old World monkeys as far back as 16 million years ago, according to a new study.
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Orphaned Baby Chimps Suffer Lasting Social Effects
Grooming Chimps
January 13th, 2016
Being orphaned as a baby may have a bigger impact on chimpanzees than was previously thought, a new study finds.
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Little Cousin: Human, Ape Ancestor Had 'Goggle Eyes'
An artist's representation reveals what the newfound primate, <em>Pliobates cataloniae</em>, would have looked like when alive some 11.6 million years ago.
October 29th, 2015
The fossil of a small primate with "goggle" eyes that strode atop tree branches, snagging snacks of fruit, suggests the last common ancestor of all apes might have been less like humans' closest living relatives than often thought, researchers say.
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It's a Monster! Apes Remember Scary Movie Scenes
Chimpanzee Reaction
September 17th, 2015
Scientists have found that great apes may be able to remember and anticipate memorable on-screen events.
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