they developed a new method of thermoregulation. Losing all that fur made it possible for hominins to hunt during the day in the hot grasslands without overheating. An increase in sweat glands, many more than other primates, also kept early humans on the cool side....
Humans evolved from primates, who had a relatively cush existence for a long time living up in the trees away from ground predators. At some point a population of these primates were (most likely) forced down from the trees and had to survive in east Africa amidst a panoply of da...
What animal did humans evolve from? Humans are one type of several living species ofgreat apes. Humans evolved alongside orangutans, chimpanzees, bonobos, and gorillas. All of these share a common ancestor before about 7 million years ago. Learn more about apes. ...
And why would chimpanzees and humans display this sort of behavior when other primates don't? The truth is that we don't have all the answers. Evolutionary psychologists might say that our prehistoric ancestors passed down a tendency toward violent behavior, particularly among males. But even if...
How did crows get so smart? Crows are intelligent birds, known to use toolsto grab insects from inside trees, to communicate with gestures, and to remember people who've posed a threat. While crows haven't evolved the same brain structures that give humans and primates their intellig...
Question: Why do scientists want to clone animals? Cloning: Cloning is the process of making a genetically identical copy of an organism. Although scientists can artificially perform cloning in a lab, cloning is actually a natural reproductive strategy for many animals such as worms, sea stars an...
Yet there’s been equal time for divergent selection on both bodies and brains of males and females, so why did one (bodies) evolve sex differences and the other not (brains)? There’s noa priorireason to assume that brains are immune to divergent evolution, for sexual selection is based ...
The walking tests showed that the chimps, as a group, averaged the same energy expenditure walking on all fours as they did walking on two legs. As a group, the humans used 75 percent less energy walking upright than the chimps used walking on all fours. Essentially, walking upright seemed...
HOW DID PLASTICITY EVOLVE? The costs of evolving plastic processes are not known, even though the costs of maintaining them are likely to be low (van Buskirk and Steiner, 2009). Plasticity is conserved across all multicellular taxa (Bateson and Gluckman, 2011). Given that evolutionary change ...
Dudley traces the link between the fruit-eating behavior of arboreal primates and the evolution of the sensory skills required to identify ripe and fermented fruits that contain sugar and low levels of alcohol. In addition to introducing this new theory of the relationship of humans to alcohol,The...