Humans have selectively bred dogs to have facial expressions like ours.

One reason we don't enjoy witnessing, hearing, or even thinking about pain in others is that it activates pain regions in our own brain.

Pain is reduced when holding hands with someone who cares.

Our brain relies on information from facial muscles to know how you are feeling.

How ‘hunches’ can save our life, how our unconscious mind trounces our conscious mind in assessing danger and sizing up dodgy characters, and why cardboard policemen work.