NATURE

Giant Lives: The great whales – such as the blue and the bowhead – are the largest animals that have ever lived on our planet. Yet these mighty leviathans feed on tiny shrimp and sardines. “Giant Lives” discovers why size matters in the world of whales.
Deep Thinkers: In some respects the brains of whales and dolphins are more complex than ours. Whales and dolphins work co-operatively, show empathy and are self-aware. “Deep Thinkers” finds out how clever — and how much like us — whales and dolphins might be.