How does the night work? -- History of the night -- The sky at night -- Are you afraid of the dark? -- The Moon -- We are stardust -- Stargazing: look up! -- Wonders of the night sky -- The Earth at night -- The city -- The desert -- The rainforest -- The mountains -- The savannah -- The woodland -- The ocean -- Animals at night -- Sleep and dreams -- Nocturnal animals -- Humans at night -- Rhythm of the night -- What sleep means to us -- Dreams and night visitors -- The history of human sleep -- Extreme day and nights -- Sleep around the world -- Celebrating the night -- Goodnight.