A 200,000 year old jawbone tells the story of an elderly woman who was kept alive thanks to the kindness of her companions. From this first known example of human compassion to modern day heroes, the final programme in the Human Instinct series explores the most complex of instincts. The instinct to put others first.
Horizon uncovers the truth about how you really make decisions. Every day you make thousands of decisions, big and small, and behind all them is a powerful battle in your mind, pitting intuition against logic. This conflict affects every aspect of your life - from what you eat to what you believe, and especially to how you spend your money. And it turns out that the intuitive part of your mind is a lot more powerful than you may realise.
In part 2, Prof. Arthur Shapiro takes us through visual illusions that show how our brain processes retinal impressions from light and dark. Watch as things "move" while they are standing still. It will be hard to believe your eyes after watching this program!