All episodes
The Punk Rock Desert Poplar
The Menacing Antarctic Leopard Seal
The Loggerhead Shrike: Avian Hellraiser and Butcher Bird
The Deadly Sacredness of Tobacco
The Winter Ghost: Canada Lynx
The Stinky Stapelia Gigantea: Carrion Plant Logic
Andrewsarchus: The Largest Carnivorous Land Mammal?
The Logic of Moose Antlers
Platybelodon: The Shovel-Tusked Elephant Relative
Snapping Turtle Encounters and Conservation Efforts
Birds of Prey Alignment Chart
The Deadly Manchineel Tree: Nature's Poison Apple
The Square-Headed Tibetan Fox: Plateau Predator
The Antagonistic Co-evolution of Duck Genitalia
The Mighty Mosasaurus: Lizard of the Meuse
Immortal Organisms and Negligible Senescence
The Fate of the Barbary Lion
Bear Evolution: Cat Sized to Car Sized
Dinotherium: The Terrible Backwards-Tusked Elephant
Siphonophores: Largest Deep-Sea Superorganisms
The Deep Ocean's Weird and Wonderful Creatures
The Legendary Dragon Blood Tree of Socotra
The Life and Legacy of Coca
The Wonders of Animal Migration
Zombie Ants, Blood Vampires, and Biological Imposters: Nature's Extreme Evolutionary Arms Race
Antlions: Real Life Sarlacc Pits
The Enigmatic Amazonian Bush Dog
Why Crabs Are Evolution On Steroids
The Day Dinosaurs Died
Nightjars: Masters of Camouflage and the Night Sky
Water Hemlock: North America's Most Toxic Plant
Horseshoe Crab Marvels: Medicine and Mating Frenzy
Colombia's Cocaine Hippo Crisis
Evolutionary Monsters: Chimaeras and Lampreys
The Rise and Fall of Giant Mustelids
The Unseen Evolution of Bed Bugs
Strange Creatures and Conservation on Phillip Island
The Unique World of Proboscis Monkeys
Helicoprion: The Buzz Saw Shark
Livyatan: Miocene Megatooth Sperm Whale Predator
The Shark Alignment Chart
Slime Molds: Goop Organisms Outperform Humans
The Amazing Evolution of Animal Silk
The Amazingly Weird Red-Lipped Batfish
The Science of Blue Animals
Pack Hunting: The Coordinated Strategy for Survival
The Mysterious South American Tayra
The Rare Ethiopian Wolf
Thismia: The Parasitic Fairy Lantern Plant
Matriarchy: Killer Queens of the Animal World
Dholes: The Killer Whistlers of Asia
Winners and Losers of Anthropogenic Climate Change
The Human Folly of Invasive Species
Masters of Camouflage: Animal Anti-Predator Adaptations
How the Fastest Plant on Earth Can Solve Global Food, Fuel, and Pollution Crises
The Colugo: Strangest Gliding Mammal
The Deadly Death Cap Mushroom
How Grass Conquered the World
The Evolutionary Traps of Predators and Plants
Gympie Gympie: The Suicide Plant's Agony
Tasmania's Strange Creatures: Devils, Quolls, and Wombats
Salvia Divinorum: Science and Psychedelic Effects
Winter's Amazing Hunters: Reindeer, Polar Bears, and More
African Wildcat: Ancestor of Domestic Cats
Chaga: Superfood Fungus and Medicinal Parasite
Bleeding Tooth Fungus: Appearance and Importance
The Synchronized World of Flocking and Swarming
Hydnora: The World's Strangest Parasitic Plant
The Evolution and Diversity of Turtle Shells
The Superpowers of Nocturnal Animals
Animal Thermoregulation: The Science of Staying Cool
Mule Deer: Western Antler King
The Evolutionary Wonders of Pygmy Animals
Evolution of Stingers and Painful Venom
Sengi: Africa's Secretive Sprinters and Shrews
Cormorants: Hated, Thriving Fish-Eating Birds
The Enigmatic Giant Squids
The Amazing World of Animal Hermaphroditism
Startle Coloration and Animal Bluffing Displays
Carnivorous Plants, Stinky Fungi, and Explosive Seed Dispersal
Orcas Versus Humpback Whales: The Ultimate Ocean Beef
Mimic Octopus: Master of Disguise
River Hippos Versus Pygmy Hippos
The Dark Side of Dolphins
India's Big Four Deadly Snakes
How 20,000 Birds Beat the Australian Army and Machine Guns
Domestic Cats: Apex Predators and Ecosystem Impact
Titans of Paleontology: Extinct Giants of Earth
Portuguese Man O' War: A Colonial Organism
The Ten Deadliest Small Cats
Animal Self-Destruction: Instincts Gone Awry
The Majestic Ocean Sunfish: Mola mola
The Difficult Life of a Sloth
The Weirdest Animal Mating Rituals Explained
Prototaxites: The Enigmatic Giant Fungi of the Devonian
Tree Kangaroo: The Living Plush Toy
The Permian Nightmare: Synapsids and Saber-Tooth Beasts
The Crocs That Ran Like Horses
Moroccan Tree-Climbing Goats and Argan Oil
Apex Predators of the Amazon River