While brains are remarkably plastic erasing experiences from memory is virtually impossible. Would it not be wonderful if we could forget memories that can cripple us? Rewriting our histories may be harder than gene editing.
Different brain systems are the basis of two types of decision making. Some decisions are made quickly, without reflection, and without evidence. The other type of decision is much slower, is evidence-based, systematic, with reflection.
How many genes determine how tall you are? The answer is several dozen. Most of our characteristics are determined not by a 
single gene.
Even 5-month-old babies can experience, know, fear. Five-month-old babies possess networks of brain cells that react to facial emotions, especially fear. These networks are in place at birth.
