Life in the Universe: Where to Look
Sexual Reproduction: More Than Two Sexes
Idaho Beaver Drop: When Beavers Parachuted Into the Wild
Why Disease Killed More Soldiers Than Battle
Mitochondrial Eve: What She Really Means
Fire and the Cooking Hypothesis in Human Technology
Toddler Self-Discovery: Pointing and the Mirror Test
Human Mating: Why Partners Often Resemble Each Other
Tulip Mania: Why the Rarest Tulips Were So Valuable
Cells: The Bacterium You Can See Without a Microscope
Humans: Engineered for Endurance
Society: Is War in Our Nature?
Delayed Postpartum Period
Life’s Big Leap: From Single Cells to Many
Tardigrades: Tough, Not Invincible
Life and Oxygen: When Poison Sparked Complexity
Why Sexual Reproduction Is a Puzzle
Humans: Emotional Tears and Mental Time Travel
Africa: Cradle of Modern Humans
Extinction and Survival
Agriculture — Animals Invented Farming First
Post-classical History: How Plague Reshaped the World
Climate Change and Moving Species
Inflammation: The Immune System's First Alarm