Stem cells can differentiate into 220 different types of body cell. The development of these cells can now be systematically observed and investigated with the aid of two new machines that imitate the conditions in the human body with unprecedented accuracy.

Having close ties with parents is obviously good for preschoolers, but what does that really mean? It means that the preschoolers are better able to control their own behavior by showing patience, deliberation, restraint, and even maturity.

MIT neuroscientists exploring how memory formation differs between children and adults have found that although the two groups have much in common, maturity brings richer memories.