Catarrhines have narrow downward facing nostrils, while platyrrhines have broad, flat, sideways facing nostrils. There are certain physical features that help set primates apart from other animals. Primates have forward facing eyes that give them both binocular vision and stereoscopic vision.

For instance, some early hominins had bony structures that suggested the presence of powerful muscles for mastication, or chewing, and they had very large chewing teeth, indicating that they were likely adapted for processing harder objects. These fossils had unusually flat faces.

Features that distinguish the primate skull from that of most other mammals include orbital convergence and orbital frontation, the presence of a postorbital bar, and an increase in cranial base flexion along with a decrease in the cranial base angle.

What do most living primates have in common?

• Large brains (in relation to body size)
• Vision more important than sense of smell.
• Hands adapted for grasping.
• Long life spans and slow growth.
• Few offspring, usually one at a time.
• Complex social groups.

chimpanzees

Evolution waits for no man. Evolution is an ongoing process, although many don’t realize people are still evolving. It’s true that Homo sapiens look very different than Australopithecus afarensis, an early hominin that lived around 2.9 million years ago.

Inside our bodies at any moment, weak cells die and are replaced with healthier ones. Individual cells die for the sake of the organism as a whole. As cellular health declines over time, it leads to the symptoms we know as aging.

If you define crying as expressing emotion, such as grief or joy, then the answer is yes. Animals do create tears, but only to lubricate their eyes, says Bryan Amaral, senior curator of the Smithsonian’s National Zoo. Animals do feel emotions, too, but in nature it’s often to their advantage to mask them.

Marilyn vos Savant

The maximum IQ score assigned by the WAIS-IV, a commonly-used test today, is 160. A score of 135 or above puts a person in the 99th percentile of the population. News articles often put Einstein’s IQ at 160, though it’s unclear what that estimate is based upon.

IQ classification is the practice by IQ test publishers of labeling IQ score ranges with category names such as “superior” or “average”….Wechsler Intelligence Scales.

For defining categories the international literature usually uses cut-offs of 115 – 129 as mildly gifted, 130 – 144 as moderately gifted, 145 – 159 as highly gifted, and above 160 as extremely gifted.

An IQ score over 140 indicates that you’re a genius or nearly a genius, while 120 – 140 is classed as “very superior intelligence”. 110 – 119 is “superior intelligence”, while 90 – 109 is “normal or average intelligence”.

To qualify for gifted status, students generally had to score at least 130 on the IQ test.

The average or normal, range of IQ is 90 to110; IQ scores of at least 120 are considered superior. Mental retardation is defined as an IQ below 70, which corresponds to the lowest 2.2 percent of the population (B. J. Sadock & V. A.

Most people (about 68 percent) have an IQ between 85 and 115. Only a small fraction of people have a very low IQ (below 70) or a very high IQ (above 130). The average IQ in the United States is 98.

Age. IQ can change to some degree over the course of childhood. In one longitudinal study, the mean IQ scores of tests at ages 17 and 18 were correlated at r=0.86 with the mean scores of tests at ages five, six, and seven and at r=0.96 with the mean scores of tests at ages 11, 12, and 13.

Here are 12 ways you can help maintain brain function.

1. Get mental stimulation.
2. Get physical exercise.
3. Improve your diet.
4. Improve your blood pressure.
5. Improve your blood sugar.
6. Improve your cholesterol.
7. Consider low-dose aspirin.
8. Avoid tobacco.