ANIMALS Creatures big, small and gloriously weird - from three-hearted octopuses to cube-pooping wombats. 53 facts ALL MAMMALS SEA LIFE BIRDS REPTILES & AMPHIBIANS MINIBEASTS RECORD-BREAKERS
DINOSAURS The giants, the tinies and the feathery cousins that ruled Earth for 165 million years. 50 facts ALL GIANTS PREDATORS PLANT-EATERS FEATHERED DISCOVERIES
OCEAN From sunlit reefs to crushing trenches, the ocean is Earth's biggest and least-explored neighborhood. 50 facts ALL REEF LIFE DEEP SEA WHALES SHARKS WONDERS
SPACE Planets, stars, black holes and the wild edges of the universe - bigger and weirder than you'd ever guess. 54 facts ALL PLANETS STARS BLACK HOLES SPACE TRAVEL RECORD-BREAKERS
HUMAN BODY The squishy, spinning, signal-firing machine you live inside every day. 50 facts ALL BRAIN SENSES CELLS BONES & MUSCLES RECORD-BREAKERS
SCIENCE How everything around you actually works - light, heat, matter, energy, life. 51 facts ALL PHYSICS CHEMISTRY BIOLOGY EARTH
WEATHER Storms, seasons, lightning and snow - the engine of the sky in motion. 50 facts ALL STORMS LIGHTNING SNOW & ICE SEASONS
GEOGRAPHY & EARTH Mountains, rivers, deserts, volcanoes and the bones of the planet itself. 52 facts ALL MOUNTAINS RIVERS & LAKES DESERTS VOLCANOES & CAVES COUNTRIES
PLANTS & NATURE Giant sequoias, carnivorous plants, talking trees and the green half of life on Earth. 50 facts ALL TREES FLOWERS CARNIVOROUS FUNGI
HISTORY Kings, empires, inventors, wars and the turning points that shaped the world we live in. 50 facts ALL ANCIENT MEDIEVAL MODERN WARS CODES
INVENTIONS & TECH The bright ideas, accidents and obsessions - from the light bulb to space rockets and smart phones. 50 facts ALL MACHINES COMPUTERS MEDICINE DAILY LIFE ROBOTS & AI
VEHICLES Anything that rolls, flies, floats or rockets - and the engineering that makes it move. 50 facts ALL CARS AIRCRAFT TRAINS SHIPS ROCKETS
FOOD What we eat, why we eat it, and the strange stories behind your favorite snacks. 50 facts ALL FRUIT SWEETS DRINKS ORIGINS
MYTHS & MONSTERS Greek gods, Norse giants, dragons, sea monsters and the cryptids people still claim to see. 54 facts ALL GREEK NORSE EGYPTIAN DRAGONS CRYPTIDS
FAMOUS PEOPLE The inventors, explorers, scientists, athletes and rebels whose lives became history. 50 facts ALL SCIENTISTS EXPLORERS ARTISTS LEADERS ATHLETES
RECORD-BREAKERS The fastest, biggest, smallest, oldest and most extreme - the world at its outer edges. 50 facts ALL BIGGEST SMALLEST FASTEST OLDEST DEADLIEST
