Richard E Grant explores the evolutionary roots of Wrath. Like humans, animals also experience a rush of blood to the head, fuelled by a cocktail of hormones.

Richard E Grant explores the evolutionary roots of Lust - the intense, out-of-control craving ... for sex. Animals feel lust too - otherwise species would die out.

Richard E Grant explores the evolutionary roots of Sloth - pure laziness. What role does it play in nature, which is usually built on fierce competitiveness?

Richard E Grant explores the evolutionary roots of gluttony - eating too much, too quickly, or too wildly. Does it also exist in the natural world?

Richard E Grant explores the evolutionary roots of envy - an obsession with the possessions of others. Does it also exist in the animal kingdom?

Richard E Grant explores the evolutionary roots of pride. From stag beetles, to gorillas, to hyenas, do animals also display this seemingly human trait?

Richard E Grant explores the evolutionary roots of greed - the act of taking too much. From hamsters, to baboons, do animals also display this seemingly human trait?