|Human Intelligence Secrets Revealed by Chimp Brains||@ livescience|
Despite sharing 98 percent of our DNA with chimpanzees, humans have much bigger brains and are, as a species, much more intelligent.
Now a new study sheds light on why:
- Unlike chimps, humans undergo a massive explosion in white matter growth, or the connections between brain cells, in the first two years of life.
It doesn’t matter what the color of your skin is or where you were born. It doesn’t matter if you’re rich, poor, young, elderly, sick, healthy, or unique. Everyone in the world holds an inherent set of instinctive behaviors. Some of the behaviors include a collection of reflexes. Scientists continue to examine the purpose of these instincts and develop hypotheses on their function. Many of the instincts remain an evolutionary mystery. For this article I have focused on reflexes in adults and left out the common primitive reflexes.
A primitive reflex is displayed by normal human infants and not neurologically intact adults. Some examples include the Palmar grasp reflex, which is the tendency for babies to close their hand around anything that strokes the palm. The swimming reflex occurs if you place a small infant in water. In response they will begin to paddle and kick. Up until the age of four months, an infant will turn its head towards anything that strokes its cheek or mouth. This is known as the rooting reflex and is used to assist in breastfeeding.
History of life on earth.
Cells are the structural and functional units of all living organisms. Some organisms, such as bacteria, are unicellular, consisting of a single cell. Other organisms, such as humans, are multicellular, or have many cells—an estimated 100,000,000,000,000 cells! Each cell is an amazing world unto itself: it can take in nutrients, convert these nutrients into energy, carry out specialized functions, and reproduce as necessary. Even more amazing is that each cell stores its own set of instructions for carrying out each of these activities.
Before we can discuss the various components of a cell, it is important to know what organism the cell comes from. There are two general categories of cells: prokaryotes and eukaryotes.