Why are humans slower than chimpanzees?

Humans take longer to grow than primates because childhood energy is used for the brain more than body growth.

>>>Chimp hugged goodbye
>>> Chimp "talk" with people

People spend time at the age of children and youth almost twice as much as other primates like chimpanzees, gibbons, monkeys. A new study shows that children 's brains consume too much metabolic energy from glucose taken from the rest of the body, so the baby' s body grows slowly , Science Mag said.

Humans grow more slowly than primates.(Photo: Simon Thomas)

The research team led by Christopher Kuzawa of Northwestern University in the US led the study using tomography tomography of 36 people from childhood to 30 years old, carried out in 1987, to evaluate the tendency to steam Glucose collected at 3 main parts of the brain.

They then combined the data with the brain mass of more than 400 people from 4.5 years to adulthood, collected from the National Institute of Health. Finally linking the brain's glucose uptake to age and body size to draw conclusions.

Research results show that when the brain needs more energy, body growth will slow down. The period of human brain absorption of glucose is highest at 4.5-5 years old, coinciding with the lowest period of human weight gain.

"The energy needs of the brain and the body's response to growth in humans are contradictory, which is why a period of slow human growth," said Karin Isler, an anthropologist from the University of Zurich. Switzerland, say.

"In the future, we will find out whether similar trade- offs occur in other primates, but this is very difficult and may not be possible , " Kuzawa said.