12 February 2010, 11:16 AM ET
Most of us can understand how we feel if someone else gets a better reward for doing the exact same work we did. Researchers are studying how these feelings of inequity evolved and if primates have the same sense of inequity.
02 February 2010, 05:37 AM ET
While chimps grow out of their generous behaviors, bonobos continue to share into adulthood.
27 January 2010, 03:33 AM ET
Dramatic geological events may have driven the origin of primates.
21 December 2009, 04:39 AM ET
A chimp's capability to understand flames provides clues to how our distant ancestors first learned to control fire.
16 December 2009, 10:13 AM ET
Scientists have captured video of the world's rarest great ape.
14 December 2009, 07:02 AM ET
From crows that craft twigs into usable objects to elephants that morph tree branches into fly swatters, the animal kingdom is full of adept tool makers.
28 November 2009, 04:21 AM ET
An experiment finds that chimps may have a sense of musical rhythm.
11 November 2009, 08:13 AM ET
A gene found in brain cells could explain how we acquired speech.
11 November 2009, 07:54 AM ET
Why did we start using tools? What do other tool users in our family tree say about our early evolution?
11 November 2009, 07:01 AM ET
A rare monkey may have mated with baboons in the past.
04 November 2009, 11:24 AM ET
Chimpanzees offer many clues as to how we evolved our human traits.
16 October 2009, 05:51 AM ET
Primate communication systems shed light on the origins of language and music.
08 October 2009, 08:09 AM ET
The mother-child bond may have roots in other primates.
16 September 2009, 09:15 AM ET
After successful gene therapy, this male squirrel monkey that was once colorblind can now pick out red dots from the grey background. When the monkey correctly noses the red patch, a positive tone sounds and the monkey gets a drop of juice.
16 September 2009, 09:00 AM ET
Gene therapy has given two color-blind monkeys the ability to see red.
15 September 2009, 05:08 PM ET
It doesn't even take a real chimp to pass on the yawning bug.
15 September 2009, 07:44 AM ET
Dolphins and some non-human primates rival humans in cognitive abilities.
10 September 2009, 04:56 AM ET
A study shows that chimps have specific tools for specific tasks.
18 August 2009, 06:03 AM ET
A primate skull and sloth bones are some of the treasures discovered in a prehistoric cave.
13 August 2009, 10:04 AM ET
Capuchin monkeys show affiliation for those who imitate them, similar to humans.
10 August 2009, 11:03 AM ET
Many scientists think early humans walked on their knuckles before evolving the ability to walk upright, but a new study suggests they may have bypassed that step.
04 August 2009, 08:55 AM ET
Monkey's learn more after a success than after a failure, according to a new study.
07 July 2009, 09:35 AM ET
A new monkey subspecies with quite a long tail has been discovered in a remote region of the Amazon in Brazil.
29 June 2009, 06:31 AM ET
Contrary to popular wisdom, two biologists are arguing that orangutans, not chimps, are humans closest relatives.
28 June 2009, 06:21 AM ET
When baby rhesus monkeys want to suckle, they do what human infants do: cry, cry, cry.
12 June 2009, 05:20 AM ET
Humans might be the only primates that truly understand the value of a good trade.
04 June 2009, 08:04 AM ET
Laughter can be traced to back to the last common ancestor of humans and great apes.
28 May 2009, 09:09 AM ET
A third species of the extinct giant lemurs has been discovered in northwest Madagascar, the first addition to the group in more than 100 years.
20 May 2009, 10:13 AM ET
A new primate fossil has made waves among scientists and non-scientists.
20 May 2009, 08:33 AM ET
The mishmash of features in a new primate fossil reminds us that the story of our past might be more complicated than we think.
19 May 2009, 11:44 AM ET
Scientists unveiled a 47-million-year-old fossil with much pomp and circumstance today at the American Museum of Natural History.
18 May 2009, 01:03 PM ET
Scientists have found neurons in monkey's brains that may be responsible for gaze-following behavior
14 May 2009, 10:11 AM ET
Monkeys think about rewards they could have had
08 May 2009, 05:59 AM ET
The instruction from public health officials to keep away from others to stop the spread of the swine flu is a tough one for us primates.
13 April 2009, 01:02 PM ET
Early humans were not as good at climbing as chimps, a new study suggests.
07 April 2009, 05:58 PM ET
A new study found that wild chimpanzees exchange meat for sex.